11. Which of the following is/are logically equivalent to $\neg ( P \Longrightarrow Q )$ ? (a) $\neg P \vee Q$ (b) $\neg P \wedge Q$ (c) $Q \Longrightarrow P$ (d) $P \wedge \neg Q$
11. Which of the following is/are logically equivalent to $\neg ( P \Longrightarrow Q )$ ?\\
(a) $\neg P \vee Q$\\
(b) $\neg P \wedge Q$\\
(c) $Q \Longrightarrow P$\\
(d) $P \wedge \neg Q$\\