Write all the geometrical isomers of `[Pt(NH_3)(Br)(Cl)(py)]` and how many of these will exhibit optical isomers?

Explanation

The given complex is of the type MABCD. Three isomers are possible as follows :

Isomers of this type do not show any optical isomerism. Optical isomerism only rarely occurs in square planar or tetrahedral complexes and that too when they contain unsymmetrical chelating ligand.