UGC NET Questions (Paper – 1)

Statement B correctly negates the universal “all swans are white” by asserting that at least one swan is not white. Statement C is also correct because the negation of “no students are late” is that some students are late. Statement E summarises the general pattern for negating universal statements: replace “all” by “some” and negate the predicate. Statement A is false because “no swans are white” is stronger than the needed negation, and D is false since the negation of “some teachers are not researchers” is “all teachers are researchers”. Therefore, B, C and E only are correct, which matches option B.

Option A:
Option A is incomplete because it omits E (the general rule) and does not include all correct statements needed for the full set.

Option B:
Option B is correct as it combines the proper negations of specific universal and negative statements with the general quantifier rule, while excluding A and D, which overstate or misstate the negations.

Option C:
Option C is wrong because it includes A, which makes the negation of “all swans are white” too strong, so it contains an incorrect statement in the combination.

Option D:
Option D is incorrect since it includes D, which misnegates an existential negative statement, and it omits C, losing one of the correct concrete examples.

Statements A, B, C and E correctly describe how quantifiers are treated in logic and in the exam, while D is false. Logical “some” is inclusive and allows the possibility that all elements satisfy the predicate, even if conversational usage often suggests otherwise. The universal “all” and “no” correspond to familiar A and E categorical forms, and careful attention to these meanings is essential for solving UGC NET syllogism questions. Thus the combination that includes all true statements and excludes D is A, B, C, E only.

Option A:
Option A is correct because it gathers the logically accurate descriptions of “all”, “some” and “no” and emphasises exam importance, while omitting the misleading claim in D. It reflects both formal semantics and practical test-taking needs.

Option B:
Option B is incomplete since it leaves out E, failing to mention the explicit role quantifiers play in UGC NET question interpretation. A, B, C only therefore does not fully answer the question.

Option C:
Option C is wrong because it omits A, dropping the clear linkage between “all” and universal statements, and so B, C, E only presents only part of the correct picture. Missing A is significant because universal claims are central to categorical logic.

Option D:
Option D is also incorrect as it excludes B, leaving out the crucial clarification that logical “some” does not automatically imply “not all”. A, C, E only is therefore not the full set of true statements.

This option is correct because the logical negation of a universal statement "All S are P" is an existential statement "Some S are not P." Here, "All students are punctual" negates to "Some students are not punctual." Thus, the correct word to fill the blank is "Some."

Option A:
Saying "No students are not punctual" would mean that every student is punctual, which actually restates the original universal claim in a different form. It does not express the negation. Therefore, this option is incorrect.

Option B:
The word "Most" suggests that a large majority of students are not punctual, which is stronger than merely saying at least one is not punctual. Negation in logic only needs one counterexample, so "most" is not the precise logical opposite of "all."

Option C:
The correct negation of a universal statement is existential, and "some" expresses the existence of at least one counterexample. Saying "Some students are not punctual" states that there is at least one student who fails the property, which contradicts the claim that all are punctual. Thus, this option correctly reflects the logical negation.

Option D:
Saying "Exactly two" students are not punctual again specifies a particular number of exceptions. Logical negation, however, only requires at least one exception and does not fix the number. Hence, this option is not the standard negation.