Indicate the complex ion which shows geometrical isomerism.

Options

A. `[Cr(H_(2)O)_(4) Cl_(2)]^(+)`
B. `[Pt(NH_(3))_(3)Cl]`
C. `[Co(NH_(3))_(6)]^(3+)`
D. `[Co(CN)_(5) (NC)]^(3-)`

Answer

A

Explanation

`[Cr(H_(2)O)_(4)Cl_(2)]^(+)` shows geometrical isomerism because it is a `MA_(4)B_(2)` type coordination compound which contains two set of equivalent ligands, four `H_(2)O` and `2 Cl`.
Hence, the possible geometrical isomers are

Hence, correct choice is (a).