AP ICET 10 Sep 2020 Shift 2 Paper

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Question : 111 of 200

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Algebraic and Geometrical Ability

Which one of the following options is a tautology?

(~ Q → ~ P) v Q
( P ∧ Q ) ⇋ ( ~ P ∨ ~ Q)
~ ( P ∨ Q ) ∨ (~ P ∧ Q) ∨ P
( P ∨ Q ) ∧ (~ P ∨ ~ R)

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