“If X, then Y unless Z” is represented by which of the following formulae in propositional logic ?

\(X \rightarrow (Y \wedge \neg\;Z)\)

\(\left( {X \wedge Y} \right) \to \neg \;Z\)

\(\left( {X \wedge \neg \;Z} \right) \to Y\)

\(Y \rightarrow (X \wedge \neg\;Z)\)

“If X, then Y unless Z” is represented by which of the following f

1.	“If X, then Y unless Z” is represented by which of the following formulae in propositional logic ?
A.	\(\left( {X \wedge Y} \right) \to \neg \;Z\)
B.	\(\left( {X \wedge \neg \;Z} \right) \to Y\)
C.	\(X \rightarrow (Y \wedge \neg\;Z)\)
D.	\(Y \rightarrow (X \wedge \neg\;Z)\)
Answer» C. \(X \rightarrow (Y \wedge \neg\;Z)\)