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Question

If q is false and pqr is true, then which one of the following statements is a tautology?


A
pr
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B
pr
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C
(pr)(pr)
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D
(pr)(pr)
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Solution

The correct option is A (pr)(pr)
q is F and (pq)r is T
pq is F which implies that r is F
q is F and r is F
(pr) is always F
(pr)(pr) is tautology.

Mathematics

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