The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to `+3` state is :

Options

A. `[Fe("phen")_(3)]^(2+)`
B. `[Co(phen)_(3)]^(2+)`
C. `[Zn("phen")]^(2+)`
D. `[Ni("phen")_(3)]^(2+)`

Answer

A

Explanation

`[Fe"(Phen)"^(3)]^(2+)" (Fact)"`