Which of the following statement is true...

Which of the following statement is true :-

`~(phArr ~q)` is tautology

`~(p hArr ~q)` is equivalent to `pharr q`

`(p^^ ~q)` is a fallacy

`(p ^^ ~q)^^(~p ^^q)` is a tautology

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The correct Answer is:

`{:(p,q,-q,prarrq,qrarrp,prarr-q,-qrarrp,pharrq,pharr-q),(T,T,F,T,T,F,T,T,F),(T,F,T,F,T,T,T,F,T),(F,T,F,T,F,T,T,F,T),(F,F,T,T,T,T,F,T,F):}`

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