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Let $p, q, r$ be three statements, then $(p \to (q \to r)) \leftrightarrow ((p \land q) \to r)$ , is a

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tautology

contradiction

fallacy

none of these

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Correct option is A

p→(q→r)≡∼p∨(q→r)≡−p∨(−q∨r)≡[(~p)∨(~q)]∨r≡∼(p∧q)∨r≡p∧q→r∴ given statement is a tautology.

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Let p,q,r be three statements, then (p→(q→r))↔((p∧q)→r), is a

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Let $p, q, r$ be three statements, then $(p \to (q \to r)) \leftrightarrow ((p \land q) \to r)$ , is a