Which of the following properties are same in
$$\begin{gathered} \text{I.}{\left[{\mathrm{CrCl}}_6\right]}^{3-}\mathrm{II}\cdot {\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+} \\ \mathrm{III}\cdot {\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+} \mathrm{IV}\cdot {\left[\mathrm{Cr}\right(\mathrm{CN}{)}_6]}^{3-} \end{gathered}$$

$C{r}^{3+},d^3$ configurations shows same numbe of unpaired and EAN but strength of all ligands are different so do not show same coloum and splifting