The pair(s) of coordination complexes/ions exhibiting the same kind...

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1. A\left[\text{Cr} {\left({\text{NH}}_{3}\right)}_{5} \text{Cl}\right] {\text{Cl}}_{2}$and \left[\text{Cr} {\left({\text{NH}}_{3}\right)}_{4} {\text{Cl}}_{2}\right] \text{Cl}$
2. B${\left[\text{Co} {\left({\text{NH}}_{3}\right)}_{4} {\text{Cl}}_{2}\right]}^{+}$ and ${\left[\text{Pt} {\left({\text{NH}}_{3}\right)}_{2} \left({\text{H}}_{2} \text{O}\right) \text{Cl}\right]}^{+}$
3. C${\left[\text{Co} {\text{Br}}_{2} {\text{Cl}}_{2}\right]}^{2 -}$ and ${\left[\text{Pt} {\text{Br}}_{2} {\text{Cl}}_{2}\right]}^{2 -}$
4. D\left[\text{Pt} {\left({\text{NH}}_{3}\right)}_{3} \left({\text{NO}}_{3}\right)\right] \text{Cl}$and \left[\text{Pt} {\left({\text{NH}}_{3}\right)}_{3} \text{Cl}\right] \text{Br}$