Which of the following is always true? - Vidyadip

MCQ

Which of the following is always true?

A
~(p → q) ≡ ~q → ~p
B
~(p ∨ q) ≡ ~p ∨ ~q
✓
~(p → q) ≡ p ∧ ~q
D
~(p ∧ q) ≡ ~p ∧ ~q

✓

Answer

Correct option: C.

~(p → q) ≡ p ∧ ~q

(c) ~(p → q) ≡ p ∧ ~q

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