[Cr(NH3)5Cl]Cl2and[Cr(NH3)4Cl2]Cl
[CoBr2Cl2]2−and[PtBr2Cl2]2−
[Pt(NH3)3(NO3)]Cland[Pt(NH3)3Cl]Br
[Co(NH3)4Cl2]+and[Pt(NH3)2(H2O)Cl]+
The pairs of coordination complexes/ions exhibiting the same kind of isomerism are:
Octahedral [Co(NH3)4Cl2]+ and square planar [Pt(NH3)2(H2O)Cl]+ which shows geometrical (cis-trans) isomerism.
Square planar [Pt(NH3)3(NO3)]Cl and square planar [Pt(NH3)3Cl]Br shows ionization isomerism.
The pairs of coordination complexes/ions NOT exhibiting the same kind of isomerism are:
[Cr(NH3)5Cl]Cl2 neither shows structural nor stereoisomerism.
[Cr(NH3)4Cl2]Cl shows geometrical (cis trans) isomerism.
Tetrahedral [CoBr2Cl2]2− and square planar [PtBr2Cl2]2− do not show the same type of isomerism.
Hence, options B and D are correct.