Which pair of ions has the same electronic configuration?
| 1. | \(Cr^{3+}, Fe^{3+}\) | 2. | \(Fe^{3+}, Mn^{2+}\) |
| 3. | \(Fe^{3+}, Co^{3+}\) | 4. | \(Sc^{3+}, Cr^{3+}\) |
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