Appeared in: 2024 (2 sets)
The most stable complex among the following is :
(A) $[\text{Pt}(\text{NH}_3)_2\text{Cl}_2]$
(B) $[\text{Ag}(\text{NH}_3)_2]\text{Cl}$
(C) $[\text{Pt}(\text{en})_2\text{Cl}_2]^{2+}$
(D) $\text{K}_4 [\text{Fe}(\text{CN})_6]$