Which one of the following is an example of coordination isomerism?

Options

A. `[Co(NH_(3))_(5)Br]SO_(4)` and `[Co(NH_(3))_(5)SO_(4)]Br`
B. `[Co(NH_(3))_(5)NO_(2)]Cl_(2)` and `[Co(NH_(3))_(5)ONO]Cl_(2)`
C. `[Cr(H_(2)O)_(6)]Cl_(3)` and `[Cr(H_(2)O)_(5)Cl]Cl_(2).H_(2)O`
D. `[Cr(NH_(3))_(6)] [Co(CN)_(6)]` and `[Co(NH_(3))_(6)][Cr(CN)_(6)]`

Answer

D

Explanation

Both cation and anion are co-ordination complexes