The pair(s) of coordination complexes/ions exhibiting the same kind of isomerism is(are) -

[Cr(NH₃)₅Cl]Cl₂ and [Cr(NH₃)₄Cl₂]Cl
[Co(NH₃)₄Cl₂]⁺ and [Pt(NH₃)₂(H₂O)Cl]⁺
[CoBr₂Cl₂]²⁻ and [PtBr₂Cl₂]²⁻
[Pt(NH₃)₃Cl(N₃O)]Cl and [Pt(NH₃)₃Cl]Br

Correct answer: [Co(NH₃)₄Cl₂]⁺ and [Pt(NH₃)₂(H₂O)Cl]⁺

Solution

Both [Co(NH₃)₄Cl₂]⁺ and [Pt(NH₃)₂(H₂O)Cl]⁺ exhibit geometrical isomerism due to the different spatial arrangements of their ligands around the central metal ion.

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