Spin-only' formula to calculate magnetic moment is expressed as

Deduce the structures of [NiCl_(4)]^(2-) and [Ni (CN)_(4)]^(2-) considering the hybridisation of the metal ion. Calculate the magnetic moment (spin only) of the species.

Correct order of spin only magnetic moment is

The highest value of the calculated spin-only magnetic moment (in BM) among all the transition metal complexes is :