The correct increasing order of stability of the complexes based on $\Delta_0$ value is :

1. I. $[\text{Mn}(\text{CN})_6]^{3-}$


2. II. $[\text{Co}(\text{CN})_6]^{4-}$


3. III. $[\text{Fe}(\text{CN})_6]^{4-}$


4. IV. $[\text{Fe}(\text{CN})_6]^{3-}$

Match List - I with List - II.

Choose the correct answer from the options given below :

Identify the homoleptic complexes with odd number of $d$ electrons in the central metal :

(A) $\left[\mathrm{FeO}_4\right]^{2-}$

(B) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

(C) $\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}\right]^{2-}$

(D) $\left[\mathrm{CoCl}_4\right]^{2-}$

(E) $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{~F}_3\right]$

Choose the correct answer from the options given below :

The calculated spin-only magnetic moments of $K_3[Fe(OH)_6]$ and $K_4[Fe(OH)_6]$ respectively are :