Which one of the following is wrongly matched?

Options

A. `[Cu(NH_3)_4]^(2+)` - square planar
B. `[Ni(CO)_4]` - neutral ligand
C. `[Fe(CN)_6]^(3-) - sp^3 d^2`
D. `[Co(en)_3]^(3+)` - follows EAN rule

Answer

C

Explanation

`[Fe(CN)_6]^(3-)` is an inner orbital complex with the hybridisation `d^2sp^3`.