Which one of the following statements is not a tautology ?

$(p \wedge q) \rightarrow p$

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

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

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