Consider the following:

Complex	Coordination number
$\begin{array}{ll}\text{(A)}& \left[{\mathrm{CuCl}}_2\right]\end{array}$	$\left(\mathrm{i}\right) 6$
$\left(\mathrm{B}\right) \mathrm{Ni}{\left(\mathrm{CO}\right)}_4$	$\left(\mathrm{ii}\right) 5$
$\left(\mathrm{C}\right) {\left[{\mathrm{PtCl}}_6\right]}^{4-}$	$\left(\mathrm{iii}\right) 4$
$\left(\mathrm{D}\right) {\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$	$\left(\mathrm{iv}\right) 2$

Proper matching is: