In the compound ${\mathrm{CoCl}}_3\cdot 5{\mathrm{NH}}_3$

In is ${\mathrm{CoCl}}_3\cdot 5{\mathrm{NH}}_3$ since only one Cl is directly connected to metal and the remaining two molecules fulfil the metal's oxidation state two Cl show primary valency and one Cl show primary as well as shared valancy.

$\begin{array}{cc}\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Cl}\right]& {\mathrm{Cl}}_2\\ \downarrow & \downarrow \\ (\mathrm{PV}+\mathrm{SV})& \text{ (PV only })\end{array}$

Hence correct option is C.