UGC NET Questions (Paper – 1)

A, B and E are correct; C and D are wrong. Standard notation uses “∧” for conjunction (and) and “∨” for disjunction (or), so C and D reverse meanings. Knowing symbols helps in UGC NET equivalence problems.

Option A:
Option A is incorrect because D is also wrong; selecting only C misses another error.

Option B:
Option B is incorrect because C is also wrong; selecting only D misses another error.

Option C:
Option C is incorrect because B is true (negation symbol), so including B as wrong is incorrect.

Option D:
Option D is correct because it identifies both reversed-symbol statements (C and D) as wrong.

Statements A, B and C give the standard truth conditions for conjunction, inclusive disjunction and negation in classical logic. Statement E is also correct because truth tables are precisely the tool used to define and study these connectives. Statement D is false, since a conjunction requires both conjuncts true and not just one. Thus the full set of correct statements is A, B, C and E only, which matches option B.

Option A:
Option A is incorrect because it omits E, even though using truth tables to define connectives is a central logical technique. It therefore lists only part of the true information and does not capture the complete correct set.

Option B:
Option B is correct since it includes all and only the true statements: the right truth conditions for ∧, ∨ and ¬ together with the role of truth tables in defining them, while excluding D, which misstates when a conjunction is true.

Option C:
Option C is wrong because it includes D, the false claim that a conjunction is true if at least one conjunct is true, and it omits B, so it both accepts an incorrect statement and fails to include a correct one.

Option D:
Option D is incorrect because although B, C and E are true, it drops A, which gives the fundamental condition for conjunction, so it does not contain the entire set of correct statements for this question.