Which of the following is a combination reaction?
A) SO2 + O2 → 2SO3
B) 2C2H2 + 5O2 → 4CO2 + 2H2O
C) 2H2O2 → 2H2O + O2
D) AgNO3 + NaCl → AgCl + NaNO3
Correct Answer:
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