Which one of the following is wrong ?...

Which one of the following is wrong ?

A

`p rarr q` is logically equivalent to `~p vv q`

B

If the truth values of p, q, r are T, F, T respectively, then the truth value of `(p vv q) ^^ (q vv r)` is T

C

`~(p vv q vv r) ~= ~p ^^ ~q^^ ~ r`

D

The truth value of `p ^^ ~(p vv q)` is always T

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The correct Answer is:

D

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