GKFix MCQ Question

Which of the following species represents the highest oxidation state mentioned for Manganese?

• A. Mn²⁺ in MnCl₂
• B. Mn³⁺ in MnF₃
• C. Mn⁴⁺ in MnO₂
• D. Mn⁷⁺ in MnO₄⁻