UGC NET Questions (Paper – 1)

Statements A and B describe modus ponens and modus tollens, which are valid forms, while C and D describe affirming the consequent and denying the antecedent, which are invalid. E correctly classifies A, B vs C, D in exam terms, and F restates that only A and B among the four are correct patterns. Thus A, B, E and F are true, whereas C and D are false as descriptions of valid forms. This makes A, B, E and F only the correct combination.

Option A:
Option A is incomplete because it omits F, which explicitly summarises that only A and B (among A–D) are valid patterns.

Option B:
Option B is wrong since it includes C, thereby treating affirming the consequent as if it yielded a valid inference.

Option C:
Option C is correct because it includes all true statements (A, B, E, F) and excludes the false ones (C, D).

Option D:
Option D is incorrect as it omits A (modus ponens), which is one of the key valid forms.

Modus ponens is the basic valid argument form that says: from “If P then Q” and “P,” we may validly infer “Q.” It affirms the antecedent and concludes the consequent. The pattern “If P then Q; P; therefore Q” guarantees that if the premises are true, the conclusion must be true. This is one of the most frequently used inference rules in formal and informal reasoning.

Option A:
Option A presents the correct modus ponens form, with the conditional and affirmation of the antecedent leading to the consequent. It preserves validity in all interpretations.

Option B:
Option B is the fallacy of denying the antecedent: from “If P then Q” and “not P” it draws “not Q,” which is not logically guaranteed, because Q might still be true for other reasons.

Option C:
Option C is the fallacy of affirming the consequent: from “If P then Q” and “Q” it infers “P,” which is also not always valid.

Option D:
Option D is modus tollens, a different but still valid form, which infers “not P” from “If P then Q” and “not Q,” but it is not modus ponens.

A, B and E are correct; C and D are wrong. Denying the antecedent and affirming the consequent are invalid forms; only modus ponens and modus tollens are valid. UGC NET tests spotting these invalid patterns.

Option A:
Option A is incorrect because D is also wrong; selecting only C is incomplete.

Option B:
Option B is incorrect because C is also wrong; selecting only D is incomplete.

Option C:
Option C is incorrect because B is correct (modus tollens), so including B as wrong is incorrect.

Option D:
Option D is correct because it identifies both invalid patterns (C and D) as wrong.

Statements A and B are valid argument forms (modus ponens and modus tollens). C and D are invalid forms (affirming the consequent and denying the antecedent). Statement E is also correct: validity depends on logical form, not on whether the premises are factually true. Hence the correct set of statements is A, B and E only.

Option A:
Option A is incorrect because it leaves out B (modus tollens), which is also valid, and it also ignores E, which is a true statement about validity.

Option B:
Option B is incorrect because it includes A and B but omits E, even though E correctly states that validity depends on form rather than the truth of premises.

Option C:
Option C is wrong because it includes C, and affirming the consequent is a standard fallacy; q can be true for reasons other than p.

Option D:
Option D is correct because it includes the two valid forms (A and B) and the correct general fact about validity (E), while excluding the two fallacies (C and D).

Modus ponens is the classic valid form that affirms the antecedent of a conditional. It states that if “if p, then q” is true and p is true, then q must also be true. This structure preserves truth from premises to conclusion. Therefore the argument form described in the stem is called modus ponens.

Option A:
Option A correctly names modus ponens as the rule that moves from “if p then q” and “p” to “q”. It is one of the most frequently used inference forms in deductive reasoning. Hence this option is the correct answer.

Option B:
Option B, modus tollens, involves denying the consequent by arguing from “if p then q” and “not q” to “not p”. This is a different but also valid pattern. Thus modus tollens does not match the form given here.

Option C:
Option C, disjunctive syllogism, reasons from a disjunction and the denial of one disjunct to the affirmation of the other. It uses “either…or” rather than a conditional premise. Therefore it is not the pattern described in the stem.

Option D:
Option D, hypothetical fallacy, is not a standard name for any recognised valid form. It vaguely suggests an error rather than a rule of inference. Consequently hypothetical fallacy is not an acceptable answer.

Statements A, B, C and E correctly describe different forms of hypothetical syllogisms, while D is false. A pure hypothetical syllogism chains conditionals, while mixed forms involve a conditional plus a categorical premise, as with modus ponens and modus tollens. Not every pattern with two conditionals and a categorical conclusion is valid; the form matters. UGC NET reasoning often includes such patterns, making E true. Thus A, B, C, E only is the correct set.

Option A:
Option A is incomplete because it omits E, ignoring the explicit exam focus of the question. A, B, C only therefore does not fully address the stem.

Option B:
Option B is wrong since it leaves out C, failing to mention that modus ponens and modus tollens are canonical examples of mixed hypothetical forms. A, B, E only thus under-describes the topic.

Option C:
Option C is correct as it gathers the main patterns and the exam orientation, while rightly excluding D, which overgeneralises about any argument combining two conditionals and one categorical conclusion.

Option D:
Option D is incorrect because it includes D, thereby endorsing the claim that any such structure is valid, which is demonstrably untrue. B, C, D, E only therefore mixes in a clear error.

Statements A, B, D and E correctly describe formal and informal fallacies and their exam presence, whereas C is clearly wrong. A formal fallacy is a structural mistake, while informal fallacies arise from content, language or context. Modus ponens is a valid form and thus not a fallacy at all, so calling it a formal fallacy is incorrect. Recognising patterns like ad hominem and straw man is important for UGC NET reasoning, so D and E are true.

Option A:
Option A is correct because it correctly isolates C as the single false statement while preserving the accurate explanations in A, B, D and E. It reflects the distinction between valid forms and mistaken forms in logical analysis.

Option B:
Option B is wrong since it treats A as part of the wrong set, even though A properly defines what a formal fallacy is. A and C only therefore misclassifies a true definition as incorrect.

Option C:
Option C is also incorrect because it groups D with C, implying that ad hominem and straw man are wrongly described, whereas they are rightly cited as informal fallacies. C and D only thus misrepresents the list.

Option D:
Option D is wrong as it further extends the misclassification by adding B to the wrong set, despite B accurately describing informal fallacies. B, C and D only therefore fails to preserve the correct information needed for exam preparation.

Statements A and B correctly identify modus ponens and modus tollens as valid argument forms, and D correctly states that denying the antecedent is invalid even though it superficially resembles a valid pattern. Statement E is also true because exam questions often depend on distinguishing valid inferences from fallacies. Statement C is false since affirming the consequent is a classic fallacy; from “if p then q” and “q” one cannot conclude “p” with certainty. Therefore, the combination A, B, D and E only is correct.

Option A:
Option A is incomplete because it omits E and therefore does not highlight the practical importance of recognising these forms when evaluating arguments in tests like UGC NET. Without E, the applied dimension of the topic is not fully expressed.

Option B:
Option B is also incomplete as it leaves out A, failing to mention explicitly the widely used valid pattern of modus ponens, which is central to many logical derivations. This omission weakens the conceptual coverage.

Option C:
Option C is wrong because it includes C, which treats affirming the consequent as valid, and thereby endorses a logical fallacy. Even though A, B and D are true, the presence of C invalidates the combination.

Option D:
Option D is correct as it gathers the two standard valid forms, identifies denying the antecedent as invalid and notes the value of recognising these patterns in reasoning tasks, while excluding C, the misclassification of affirming the consequent. It matches the logic syllabus for UGC NET.

Statements A, B, D, E and F correctly describe standard conditional argument forms, whereas C is false. Modus ponens and modus tollens are canonical valid patterns used widely in logical reasoning. Affirming the consequent and denying the antecedent match the invalid forms described and are classified as formal fallacies. Recognising these contrasts is exactly what many UGC NET items on conditionals are testing. Option A therefore includes all and only the correct statements.

Option A:
Option A is correct because it collects the two valid forms, identifies the two formal fallacies and notes their exam relevance while excluding the mistaken claim in C. It captures how conditional reasoning is structured in formal logic. By omitting C, it avoids treating the invalid pattern affirming the consequent as valid. Thus this option aligns perfectly with textbook accounts of conditional argument forms.

Option B:
Option B is incorrect because it includes C, which wrongly calls affirming the consequent a valid argument form. Once q is known, we cannot simply infer p on that basis without additional information. Including this invalid form among correct ones means the combination cannot be accepted.

Option C:
Option C is wrong since it omits A and adds C, treating the invalid pattern as correct while losing the explicit description of modus ponens. This distorts the central distinction between valid and fallacious reasoning with conditionals. As a result, the option fails to represent the set of true statements.

Option D:
Option D is incorrect because it leaves out F, ignoring the practical point about how exam questions use these forms, and it still includes only a subset of the true statements. Without F, the role of these patterns in UGC NET reasoning is not fully reflected. Hence this option is incomplete.