Network-Security
May 20, 2024Computer-Networks
May 20, 2024NTA UGC NET Dec 2023 Paper-2
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Question 70
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Which of the following are tautology?
(A) (P→(PɅQ))→(P→Q)
(B) ((P→Q)→Q)→(PVQ)
(C) ((PV ¬P)→Q)→((PV ¬P)→R)
(D) (Q→(PɅ ¬P))→(R→(P^¬P))
Choose the correct answer from the options given below:
(A) (P→(PɅQ))→(P→Q)
(B) ((P→Q)→Q)→(PVQ)
(C) ((PV ¬P)→Q)→((PV ¬P)→R)
(D) (Q→(PɅ ¬P))→(R→(P^¬P))
Choose the correct answer from the options given below:
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(A) Only
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(B) Only
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(A) and (B) Only
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(C) and (D) Only
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Correct Answer: C