The contrapositive of the statement "If you will work, you will earn money" is ..... .

Let $\Delta \in\{\wedge, \vee, \Rightarrow, \Leftrightarrow\}$ be such that $(p \wedge q) \Delta((p \vee q) \Rightarrow q)$ is a tautology. Then $\Delta$ is equal to

If $p \Rightarrow (\sim p \vee q)$ is false, the truth values of $p$ and $q$ are respectively

Which of the following is a tautology?

The statement $p → (p \leftrightarrow  q)$ is logically equivalent to :-

Which Venn diagram represent the truth of the statement“No policeman is a thief”