GKFix MCQ Question

What is the balanced ionic equation for the disproportionation of Mn³⁺ in solution?

• A. Mn³⁺ → Mn²⁺ + Mn⁴⁺
• B. 2Mn³⁺ + 2H₂O → Mn²⁺ + MnO₂ + 4H⁺
• C. Mn³⁺ + H₂O → MnO⁺ + 2H⁺
• D. 3Mn³⁺ → 2Mn²⁺ + Mn⁵⁺