Which of the following is an open statement

Contrapositive of the statement 'If two numbers are not equal, then their squares are not equal', is

Statement $p$ $\rightarrow$  ~$q$ is false, if

Consider the two statements :

$(\mathrm{S} 1):(\mathrm{p} \rightarrow \mathrm{q}) \vee(\sim \mathrm{q} \rightarrow \mathrm{p})$ is a tautology

$(S2): (\mathrm{p} \wedge \sim \mathrm{q}) \wedge(\sim \mathrm{p} \vee \mathrm{q})$ is a fallacy.

Then :

The statement $p \to ( q \to p)$ is equivalent to