The order of stability of complex of ion `CU^(+2),Ni^(+2),Mn^(+2)` and `Fe^(+2)` decreases in the order-

Options

A. `Cu^(+2)gtNi^(+2)gtFe^(+2)gtMn^(+2)`
B. `Mn^(+2)gtNi^(+2)gtCu^(+2)gtFe^(+2)`
C. `Ni^(+2)gtCu^(+2)gtFe^(+2)gtMn^(+2)`
D. `Fe^(+2)gtNi^(+2)gtCu^(+2)Mn^(+2)`

Explanation

To determine the order of stability of the complexes of the ions \(Cu^{2+}\), \(Ni^{2+}\), \(Mn^{2+}\), and \(Fe^{2+}\), we need to consider the ionic radii of these ions and how they affect the stability of their complexes.

### Step-by-Step Solution:

1. **Identify the Ions and Their Ionic Radii**:
- The ions we are considering are:
- \(Cu^{2+}\)
- \(Ni^{2+}\)
...