Which one of the following is wrongly matched?

Options

A. `[Cu(NH_(3))_(4)]^(2+)` - square planer
B. `[Ni(CO)_(4)]` - neutral ligand
C. `[Fe(CN)_(6)]^(3-)-sp^(2)d^(2)`
D. `[Co(en)_(3)]^(+)`- follows EAN rule

Answer

C

Explanation

`[Fe(C)_(6)]^(3-)` is an inner orbital octahedral complex.
`Fe^(3+):d^(5)`