GKFix MCQ Question

Which of the following has the same number of electrons transferred as MnO₄⁻ reduction?

• A. Cr2O72– + 14H+ + 6e– → 2Cr3+ + 7H2O
• B. Au3+ + 3e– → Au(s)
• C. O2(g) + 4H+ + 4e– → 2H2O
• D. Br2 + 2e– → 2Br–