A) \[\tilde{\ }r\to (p\,\vee q)\]
B) \[r\to (p\,\vee q)\]
C) \[\tilde{\ }r\to (\tilde{\ }p\,\wedge \tilde{\ }q)\]
D) \[p\to (q\vee r)\]
Correct Answer: C
Solution :
Contrapositive of \[(p\vee q)\,\to r\] is\[\sim \,\,r\,\to \,\sim \,(p\vee q)\equiv \,\sim \,\,r\to \,\,(\sim \,p\wedge \,\sim q)\]
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