Chlorobenzene is subjected to hydrolysis.

$2{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Br} + 2\mathrm{Na} \stackrel{\mathrm{Dry} \mathrm{ether}}{\to } \left(\mathrm{P}\right)$.

In the above reaction, the main product $\left(\mathrm{P}\right)$ is _____.

(A) ${\mathrm{C}}_4{\mathrm{H}}_{10}$

(B) ${\mathrm{C}}_3{\mathrm{H}}_8$

(C) ${\mathrm{C}}_2{\mathrm{H}}_4$

Enter the correct answer as A, B or C.