The inverse of the proposition $(p\; \wedge \sim q) \Rightarrow r$ is
$\sim r \Rightarrow\;\sim p \vee q$
$\sim p \vee q \Rightarrow \;\sim r$
$r \Rightarrow p\; \wedge \sim q$
None of these
If $p \to ( \sim p\,\, \vee \, \sim q)$ is false, then the truth values of $p$ and $q$ are respectively .
$(\sim (\sim p)) \wedge q$ is equal to .........
If $p$ and $q$ are simple propositions, then $p \Leftrightarrow \sim \,q$ is true when
Which of the following statements is a tautology?
The statement $(\mathrm{p} \wedge(\mathrm{p} \rightarrow \mathrm{q}) \wedge(\mathrm{q} \rightarrow \mathrm{r})) \rightarrow \mathrm{r}$ is :