Chemistry - Coordination Chemistry Question with Solution | TestHub

[Ni(en)₃]²⁺ shows only optical isomerism (Δ and Λ), no geometrical isomerism.

[PtCl₂(PPh₃)(NH₃)] square planar complex → shows geometrical isomerism only (cis/trans), no optical isomerism.

[Fe(en)₂(CN)₂]⁺ octahedral complex can show geometrical isomerism (cis/trans) and also optical isomerism due to chelating en ligands.

[Co(ox)Cl₂F₂]³⁻ octahedral with different ligands → shows both geometrical + optical isomerism.

Final Answer: (C) and (D)