Which one of the following is a tautology ?

$P \wedge(P \vee Q)$

$P \vee(P \wedge Q)$

$\mathrm{Q} \rightarrow(\mathrm{P} \wedge(\mathrm{P} \rightarrow \mathrm{Q}))$

$(\mathrm{P} \wedge(\mathrm{P} \rightarrow \mathrm{Q})) \rightarrow \mathrm{Q}$