$(6)$ The approximated peak voltage across each half of a center$-$tapped transformer used, $Vp\frac{sec}{2},$ in full$-$wave rectifier that has an average output voltage of $120$ V is:

$($a$)119\mathrm{.}3$ V

$($b$)376\mathrm{.}8$ V

$($e$)188$ V

$($d$)$ None of them