GKFix MCQ Question

Which of the following is NOT a redox reaction?

• A. 2H₂O(l) → 2H₂(g) + O₂(g)
• B. 2KClO₃(s) → 2KCl(s) + 3O₂(g)
• C. 2NaH(s) → 2Na(s) + H₂(g)
• D. CaCO₃(s) → CaO(s) + CO₂(g)