Jennigrami Jennigrami 12-02-2020 Chemistry contestada 12. Which of the following is a combustion reaction? A. CH4 + 202 + CO2 + 2H2O B. 2Fe + 3Cl2 → 2FeCl3 C. Ag + KNO3 → AgNO3 + K D. 2H20 → 2H2 + O2