GKFix MCQ Question

What is the correct half-reaction for the oxidation of sodium in 4Na(s) + O₂(g) → 2Na₂O(s)?

• A. 2Na + 2e⁻ → 2Na⁻
• B. 4Na → 4Na⁺ + 4e⁻
• C. 2Na → 2Na⁺ + e⁻