\( p \leftrightarrow q \) is equivalent to?....

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\( p \leftrightarrow q \) is equivalent to?
(1) \( (p \rightarrow q) \wedge(q \rightarrow p) \)
(2) \( (\sim p) \vee q \)
\( \mathrm{P} \)
(3) \( (\sim q) \vee p \)
(4) None of these


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