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If A is any statement, then which of the following is a tautology?

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If A is any statement, then which of the following is a tautology?

(a) A ∧ F

(b) A ∨ F

(c) A ∨ ¬A

(d) A ∧ T

This question was addressed to me in an interview for internship.

My query is from Logics topic in division The Foundation: Logics and Proofs of Discrete Mathematics

1 Answer

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Best answer
Correct answer is (c) A ∨ ¬A

Explanation: A ∨ ¬A is always true.

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