GKFix MCQ Question

Which of the following reactions involves the highest number of electrons transferred?

• A. MnO4– + 8H+ + 5e– → Mn2+ + 4H2O
• B. Au3+ + 3e– → Au(s)
• C. Cr2O72– + 14H+ + 6e– → 2Cr3+ + 7H2O
• D. O2(g) + 4H+ + 4e– → 2H2O