The magnetic moment of complex `(A)` of Co was found to be `4.89BM` and the `EAN` as 36, complex `(B)` with magnetic moment `3.87BM` and `EAN` as 37 and complex `(C )` with `EAN` as 36 but diamagnetic. Which of the following statements is true?

Options

A. The oxidation states of Co in (A) , (B) and (C) are +3 , +2 and +3, respectively.
B. Complexes (A) and (B) have `sp^3 d^2` hybridisation state while (C) has `dsp^3` hybridisation state.
C. The spin multiplicities of Co in (A), (B) and (C) are 3,2 and 1 , respectively.
D. The oxidation states of Co in (A) , (B) and (C) are +6, +8 and +1 respectively.

Answer

A

Explanation

The oxidation states of Co in (A) , (B) and (C) are +3 , +2 and +3, respectively.