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An equivalent expression for (pimplies q...

``An equivalent expression for `(pimplies q ^^ r) vv (r hArr s)` which contains neither the biconditional nor the conditional is``

A

`(~p vv q ^^ r) ^^ [(~r vv s )^^ (r vv ~s)]`

B

`(~p ^^ q ^^ r) vv [(~r vv s) ^^ (r vv ~s)]`

C

`(~p vv q ^^ r ) ^^ [(~r vv s) vv (r vv ~s)]`

D

None of the above

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The correct Answer is:
A
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