Which of the following Boolean expression is a tautology?

$(p \wedge q) \vee(p \vee q)$

$(\mathrm{p} \wedge \mathrm{q}) \vee(\mathrm{p} \rightarrow \mathrm{q})$

$(\mathrm{p} \wedge \mathrm{q}) \wedge(\mathrm{p} \rightarrow \mathrm{q})$

$(p \wedge q) \rightarrow(p \rightarrow q)$