Which of these is a combination reaction?

Type: MCQ • Marks: 1

A. 2H₂ + O₂ → 2H₂O

B. CaCO₃ → CaO + CO₂

C. Fe + CuSO₄ → FeSO₄ + Cu

D. AgNO₃ + NaCl → AgCl + NaNO₃

Class 10th Science

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