Consider the following metal complexes :

$\begin{array}{l}{\left[\mathrm{Co}\left({\mathrm{NH}}_3\right)\right]}^{3+}\\ {\left[\mathrm{CoCl}{\left({\mathrm{NH}}_3\right)}_5\right]}^{2+}\\ {\left[\mathrm{Co}(\mathrm{CN}{)}_6\right]}^{3-}\\ {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{H}}_2\mathrm{O}\right)\right]}^{3+}\end{array}$

The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is B.M. (Nearest integer)