UGC NET Questions (Paper – 1)

Statements A, B, C, D and E correctly characterise material implication and the distinction between necessary and sufficient conditions, while F is false. “If p then q” is indeed false only when p is true and q is false, and necessary conditions are those without which an outcome cannot obtain. Sufficient conditions guarantee an outcome when they occur, and confusing the two leads to errors like affirming the consequent. In the rain example, rain is treated as sufficient for wet ground, though not necessary because there may be other causes. Statement F reverses the relation between square and rectangle, since being a square is sufficient but not necessary for being a rectangle. Hence A, B, C, D and E only is the correct combination.

Option A:
Option A is correct because it includes all five accurate statements and excludes F, which mislabels the necessity relation between square and rectangle. It reflects standard logical semantics and familiar examples used in reasoning questions. Thus this option represents the complete and correct set of statements.

Option B:
Option B is incorrect since it adds F to the otherwise correct set, thereby endorsing a false description of the relationship between squares and rectangles. Squares meet the definition of rectangles, so being a rectangle is necessary for being a square, not the other way round. Including F therefore makes this option unsound.

Option C:
Option C is wrong because it omits B, leaving out the explicit definition of a necessary condition. Without B, the account of conditionals and conditions is incomplete, even though A, C, D and E are true. Therefore A, C, D and E only cannot be chosen.

Option D:
Option D is incorrect because it leaves out A and includes F, thereby ignoring the truth condition of material implication and accepting a mistaken example. This combination does not accurately represent the full set of correct statements about conditionals.

Statements A, B, D and E are correct, whereas C and F are false. A and B correctly describe the distribution of subject and predicate in universal forms, and D correctly notes that O distributes only the predicate. E is right that A and O are contradictories in the traditional square. C is wrong because I distributes neither term, and F is wrong because modern (Boolean) logic does not usually treat universal statements as existentially loaded. Hence A, B, D and E only is the correct combination.

Option A:
Option A is incomplete because it omits E, which correctly identifies the contradictory relation between A and O. Although A, B and D are true about distribution, leaving out E makes the description of categorical relations less complete. Therefore A, B and D only cannot be accepted as the full set of correct statements.

Option B:
Option B is incorrect as it omits D and claims only A, B and E are correct. While A, B and E are true, ignoring the distribution property of O propositions means one correct statement is missing. As a result, this option does not capture all the true statements given.

Option C:
Option C is wrong because it does not include A and instead accepts B, D and E only. Omitting A removes the basic rule for distribution in A statements. Since A is clearly correct, any option that leaves it out fails to represent the entire set of true statements.

Option D:
Option D is correct because it groups A, B, D and E, all of which align with traditional categorical logic and the square of opposition. It excludes C, which overstates I’s distribution, and F, which misrepresents modern logic’s stance on existential import. Thus this option exactly matches the set of correct statements.

Statements A, B, C and E correctly describe the truth-table method for testing validity, while D is false. Validity depends on what happens in all rows where premises are true: if the conclusion is always true in those rows, the argument form is valid; if there is even one row with true premises and a false conclusion, the form is invalid. We therefore must systematically inspect all such rows, not just one arbitrarily chosen row. In UGC NET, many candidates reason through small tables mentally, illustrating E.

Option A:
Option A is incomplete as it omits E, not acknowledging that mental truth-table reasoning is often used in the exam. A, B, C only therefore does not fully incorporate the exam-oriented aspect of the question.

Option B:
Option B is wrong because it leaves out C, neglecting the explicit description of the counterexample row that makes a form invalid. A, B, E only thus fails to give the full condition for invalidity.

Option C:
Option C is correct since it combines the method for finding rows with true premises, the criteria for validity and invalidity, and the exam practice of mental truth tables while excluding D. It reflects standard teaching and UGC NET expectations.

Option D:
Option D is incorrect because it omits A and claims that inspecting only one arbitrary row is sufficient, which contradicts the requirement to check all rows where premises are true. B, C, E only therefore cannot be correct.

Statements A, B, C and F correctly describe vyāpti in Indian logic, while D and E are false. Vyāpti captures the necessary connection between hetu and sādhya discovered through repeated observation and the ruling out of counterinstances. Nyaya treats this relation as the essential ground of any valid inference, and the smoke–fire example is frequently used in teaching and exams. D is wrong because a single coincidence does not establish invariable concomitance, and E is wrong because Nyaya does not regard vyāpti as purely a priori; empirical observation and reasoning are both involved.

Option A:
Option A is incomplete since it omits F, leaving out the specific exam-oriented reference to the smoke–fire example that often illustrates vyāpti. While A, B and C are true, they do not fully reflect how the concept is used pedagogically. Therefore A, B and C only is not entirely adequate.

Option B:
Option B is incorrect because it includes D, which claims that one accidental co-occurrence is enough to secure vyāpti, contradicting the insistence on repeated, exceptionless observation. Including D invalidates the combination. Hence A, B, C and D only cannot be accepted.

Option C:
Option C is correct because it gathers the core definitional and methodological points along with the common example used in UGC NET materials, while excluding D and E, both of which misrepresent the nature of vyāpti. Thus A, B, C and F only is the right answer.

Option D:
Option D is wrong as it omits A and includes only B, C and F, leaving out the very definition of vyāpti as invariable concomitance. Without A, the candidate would not know what relation is being discussed. Therefore B, C and F only cannot be the correct choice.

Statements A, B, C, E and F are correct, while D is false. Conversion is valid for E and I forms, obversion works by changing quality and complementing the predicate, and contraposition in its full form applies to A and O in the traditional system. Obversion is valid for all four categorical forms, and exam questions can test recognition of these operations. D is wrong because simple conversion of an A proposition is not always valid; it must usually be converted to a particular form. Therefore A, B, C, E and F only is the correct combination.

Option A:
Option A is incomplete because it stops at A, B and C and leaves out E and F, which also state correct facts about obversion and exam usage. Without acknowledging that obversion is valid for all four forms and that these operations are tested, the account is partial. Hence A, B and C only cannot be accepted.

Option B:
Option B is correct because it brings together the three operations and their main properties along with their application in UGC NET questions. It rightly excludes D, which incorrectly generalises about simple conversion of A propositions. This combination fully reflects the standard treatment of immediate inferences.

Option C:
Option C is wrong since it includes D along with B, C, E and F and omits A. Accepting D means incorrectly treating simple conversion of every A as valid, and omitting A forgets the special status of E and I in conversion. This mix of error and omission makes the option unacceptable.

Option D:
Option D is incorrect because it omits B, removing the core definition of obversion, and it also drops E. Although it mentions some correct points, without B and with the absence of E it does not capture all true statements in the list. Therefore A, C, E and F only cannot be the correct answer.

Kevalavyatireki inference draws on a vyapti known only through joint absence of hetu and sadhya; there is no case in which both are present together that can be cited. The relation is captured purely by statements like “wherever there is no sadhya, there is no hetu.” Nyaya treats such reasoning as a special pattern where negative concomitance does all the justificatory work. Thus the inference described in the stem is kevalavyatireki.

Option A:
Option A is correct because kevalavyatireki literally means “only by negative concomitance,” matching the condition that the relation is confirmed through absences alone.

Option B:
Option B, kevalanvayi, is based solely on positive instances of joint presence and therefore stands in contrast to the pattern specified in the question.

Option C:
Option C, anvayavyatireki, uses both joint presence and joint absence, relying on a richer set of instances than the purely negative case.

Option D:
Option D, purvavat, classifies inference according to temporal cause–effect direction rather than by the positive or negative character of vyapti instances.

Statements A, B and C correctly present Nyaya and Advaita accounts of illusion, while E is true about their presence in UGC NET, and F correctly notes that khyāti-vāda deals with erroneous cognition. D is false because illusions are cases of error, not pramāṇa yielding true knowledge. Thus A, B, C, E and F only is correct.

Option A:
Option A is incomplete because it omits F.

Option B:
Option B is incomplete because it omits C (Advaita view).

Option C:
Option C is incorrect because it includes D (false) and omits A.

Option D:
Option D is correct because it includes all true statements and excludes D.

Anumana is defined as knowledge that follows from the recognition of a sign and its universal concomitance with what is to be proved. When we see smoke and recall that wherever there is smoke there is fire, we infer the presence of fire by anumana. It is therefore a mediate form of cognition depending on prior knowledge of vyapti. The description in the stem fits this inferential process exactly.

Option A:
Option A, upamana, yields knowledge by comparison and similarity, not by a sign–probandum relation grounded in vyapti. It relies on resemblance rather than on an established universal connection.

Option B:
Option B, sabda, is verbal testimony, a distinct pramana in which words of a reliable authority produce knowledge. It does not operate through a linga–sadhya relation.

Option C:
Option C is correct because anumana is the standard Indian term for inference based on a reason or sign. It captures the idea of drawing a conclusion about an unperceived entity from perceived evidence.

Option D:
Option D, arthapatti, or postulation, is a pramana recognised especially in Mimamsa where a new fact is posited to reconcile apparently conflicting data. It is not the same as ordinary sign-based inference.

Prameya denotes the thing that is known when a pramana operates, for example the pot perceived or the fire inferred. It stands as the intentional object towards which cognition is directed. In Nyaya analysis of knowledge, prameya is one of the basic components alongside pramana, pramata and pramiti. Thus the object mentioned in the stem is called prameya.

Option A:
Option A, pramana, is the means or instrument of knowing, such as perception or inference, not the object that is grasped. Confusing the two collapses the distinction between channel and content.

Option B:
Option B is correct because prameya literally means that which is to be known, capturing the role of the object in the epistemic situation. It helps clarify that knowledge always has some thing as its focus.

Option C:
Option C, pramiti, refers to the cognition or knowledge itself, such as the awareness “this is a pot.” It is an internal event rather than the external object.

Option D:
Option D, pramata, is the subject or knower who experiences the cognition. While related, the knower is not the object that is being known.

Sabda is the pramana that delivers knowledge through credible verbal statements, such as those found in authentic scriptures or uttered by trustworthy experts. In traditions like Nyaya and Mimamsa, such testimony is considered an independent and irreducible means of valid cognition when certain conditions of reliability are met. Sabda thus covers truths that may not be accessible through direct perception or inference alone. Therefore the testimony-based knowledge described in the stem is called sabda.

Option A:
Option A is correct because sabda emphasises the role of authoritative speech as a channel of knowledge, recognising that much of what we know depends on others' reports. Classical discussions carefully analyse what makes a speaker or text trustworthy.

Option B:
Option B, upamana, as noted, is comparison-based knowledge arising from perceived similarity between a described object and a known one. It does not require dependence on an authoritative speaker beyond the initial description.

Option C:
Option C, arthapatti, is postulation or presumption, a pramana recognised in some schools like Mimamsa, where a new fact is postulated to reconcile apparently conflicting data; it is different from mere testimony.

Option D:
Option D, anumana, refers to inferential knowledge derived from a sign and its vyapti with the probandum, not from accepting a statement on another's authority.

Vishesha is the category postulated to secure individuality among entities that are otherwise qualitatively indistinguishable, such as atoms of the same element or separate selves. It is an ultimate, non-shareable particularity that makes each entity this one rather than that one. Without vishesha, Nyaya-Vaisheshika fears that multiplicity would collapse into undifferentiated sameness. Hence the individuating factor mentioned in the stem is vishesha.

Option A:
Option A, samanya, is the universal that unites many individuals into a class and therefore performs the opposite function of highlighting commonality rather than difference.

Option B:
Option B, samavaya, is the relation of inherence and cannot by itself account for numerical distinction among qualitatively similar entities.

Option C:
Option C, abhava, denotes types of non-existence and is not a positive differentiator that grounds identity and difference.

Option D:
Option D is correct because vishesha literally means "particularity" and is explicitly introduced in Nyaya-Vaisheshika ontology to explain how there can be many numerically distinct but qualitatively identical atoms or selves.

Paksha is the subject or locus in which the probandum is to be established, such as the hill in the classic example. All discussion about the presence of hetu and sadhya is centred on this subject. Identifying the paksha is crucial for evaluating whether the reason genuinely applies to the case under consideration. Hence, in the sentence mentioned, "hill" serves as paksha.

Option A:
Option A, sadhya, is the property to be proved, namely "fiery", and cannot be identified with the subject that bears it. Confusing the two would obscure the roles of locus and attribute.

Option B:
Option B, hetu, refers to the reason or middle term, such as smoke, that is used to justify the conclusion and is not the subject in which the property is being asserted.

Option C:
Option C is correct because paksha literally means the "side" or standpoint in dispute and names the entity about which the argument is made. Nyaya’s analysis of inference always begins by specifying this locus.

Option D:
Option D, vyapti, denotes the universal concomitance between hetu and sadhya and is a relation, not a concrete subject like the hill.

Jain thinkers distinguish between direct and indirect forms of valid knowledge. The direct form is called pratyaksha and the indirect form is called paroksha. This basic division underlies further sub-classifications such as empirical and transcendental perception. Thus, the pair mentioned in the stem is pratyaksha and paroksha.

Option A:
Option A is correct because pratyaksha literally means what is "before the eyes" and stands in contrast to paroksha, which is "beyond the eyes" or indirect. The Jaina framework of pramanas begins from this fundamental bifurcation.

Option B:
Option B, sabda, is verbal testimony and is usually counted as a kind of paroksha rather than as the direct counterpart to it. It cannot complete the basic dichotomy introduced in the question.

Option C:
Option C, anumana, is inference, which again belongs on the side of indirect knowledge rather than being placed opposite to it.

Option D:
Option D, upamana, is comparison-based cognition and, like anumana and sabda, is treated as a mediated form of knowing, not as the direct pole of the distinction.

Contradictory propositions are such that one must be true and the other must be false in every possible situation. On the square of opposition, A and O types and E and I types stand in this relation. The defining feature is that they cannot both be true and cannot both be false. Therefore the pair described in the stem are called contradictories.

Option A:
Option A is correct because contradictories exactly capture the mutual exclusivity and exhaustive character mentioned. If one member of a contradictory pair holds, the other must fail, and vice versa. This condition matches the description given in the statement.

Option B:
Option B, contraries, cannot both be true but can both be false, as with "All S are P" and "No S are P". They lack the requirement that one must be true when the other is false. Hence contraries are not the right relation here.

Option C:
Option C, subcontraries, cannot both be false but can both be true, as in "Some S are P" and "Some S are not P". This is the opposite pattern to that described in the question. Therefore subcontraries are not appropriate.

Option D:
Option D, subalterns, involve a relation of implication between universal and particular forms where truth flows downward. They do not exhibit the stringent mutual exclusivity of contradictories. Thus subalterns do not fit the stem.

Statements A through E accurately capture how basic quantifier notions are understood and used in reasoning and exams. “At most one” and “exactly one” require structured combinations of quantifiers and identity conditions, as noted in C and D. E is true because Paper 1 often expects conceptual understanding without full symbolism. F is false since the existential quantifier alone cannot express “at most one” or “exactly one” without additional logical resources. Therefore A, B, C, D and E only is the correct combination.

Option A:
Option A is incomplete because it omits E, not acknowledging the UGC NET context in which such quantifier reasoning appears. While A, B, C and D are true, they do not fully answer the question as posed.

Option B:
Option B is correct since it gathers all the true statements about quantifiers and their informal use in exam questions, and it excludes F, which overstates the expressive power of a single quantifier. This matches how quantifier ideas are treated at the Paper 1 level.

Option C:
Option C is wrong as it includes F, suggesting that existential quantification alone can handle “at most one” and “exactly one”. Without identity and sometimes universal conditions, these claims cannot be captured properly. Thus this option is incorrect.

Option D:
Option D is also incorrect because it omits B, losing the basic reading of the universal quantifier, and still fails to include all the correct statements. As such, it cannot be the right choice.