A) \[\tilde{\ }Q\leftrightarrow \tilde{\ }P\wedge R\]
B) \[\tilde{\ }Q\leftrightarrow \tilde{\ }P\vee R\]
C) \[\tilde{\ }Q\leftrightarrow \tilde{\ }P\vee \tilde{\ }R\]
D) \[\tilde{\ }Q\leftrightarrow P\wedge \tilde{\ }R\]
Correct Answer: D
Solution :
Symbolic form \[\left( P\Lambda \sim R \right)\overset{{}}{\longleftrightarrow}Q\] \[\therefore \]\[\tilde{\ }\left[ \left( P\Lambda \sim R \right)\overset{{}}{\longleftrightarrow}Q \right]\] \[\] Using Demerojans law
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