If $z_1=(3-4j)$ and $z_2=(1+j),$ which of the following options shows the product $z_1{z}_2$ in polar form?

$z_1{z}_2=4e^{j60}$

$z_1{z}_2=\frac{\sqrt[\phantom{2}]{50}}{{?}_{351\mathrm{.}9}}$

$z_1{z}_2=\frac{50}{{?}_{}}\frac{?}{(4)}$

$z_1{z}_2=\frac{\sqrt[\phantom{2}]{50}}{{?}_{171\mathrm{.}9}}$