Which of the following proposition is false? (a) p ∨ ~p is a tautology (b) ~(~p) ↔️ p is a tautology (c) (p ∧ (p→q) → p is a contradiction (d) p ∧ ~p is a contradiction
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option b
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(b) ~(~p) ↔️ p is a tautology
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