Which of the following is true

Which of the following pairs are not logically equivalent ?

Which of the following is logically equivalent to $\sim(\sim p \Rightarrow q)$

The proposition $p \rightarrow \sim( p \wedge \sim q )$ is equivalent to

The Boolean expression $\left( {\left( {p \wedge q} \right) \vee \left( {p \vee  \sim q} \right)} \right) \wedge \left( { \sim p \wedge  \sim q} \right)$ is equivalent to