Which of the following statements is a tautology ?
- (A)
- (B)✓ Correct
- (C)
- (D)
Answer: (B)
Solution
Using , the compound statement becomes . Regrouping, , true under every assignment. The other three expressions simplify to , and , none of which is always true. Hence the tautology is .
JEE Main · 2023 · 01 Feb 2023 · Shift 2 · Single correct option