GKFix MCQ Question

What is the correct half-reaction for the reduction of hydrogen in 2Na(s) + H₂(g) → 2NaH(s)?

• A. H₂ → 2H⁺ + 2e⁻
• B. H₂ + 2e⁻ → 2H⁺
• C. H₂ → 2H⁻ + 2e⁻
• D. H₂ + 2e⁻ → 2H⁻