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Mr. Dubey • 52.63K Points
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Q. Which of the following statement is correct?

(A) p ∨ q ≡ q ∨ p
(B) ¬(p ∧ q) ≡ ¬p ∨ ¬q
(C) (p ∨ q) ∨ r ≡ p ∨ (q ∨ r)
(D) all of mentioned
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