The compound propositions p and q are called logically equivalent if is a tautology.

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Q.) The compound propositions p and q are called logically equivalent if                  is a tautology.

(A) p ↔ q

(B) p → q

(C) ¬ (p ∨ q)

(D) ¬p ∨ ¬q

Correct answer : Option (A) - p ↔ q

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