Common argument forms validity – UGC NET Question

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).