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~r(~p)(~q) is equivalent to 

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By Expert Faculty of Sri Chaitanya
a
p∨q⇒r
b
r⇒p∨q
c
p∧q⇒r
d
r⇒p⇒q

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detailed solution

Correct option is A

Consider (~r⇒∼p∧~q)≡(~r⇒∼(p∨q))≡p∨q⇒r


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The contrapositive of inverse of p→∼q is

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