Please help :/ || 10 pts || will mark brainlest ||

In which equation is carbon dioxide a product?
Group of answer choices

CH4 + 2O2 --> CO2 + 2H2O

CO2 --> C + O2

2H2O --> 2H2 + O2

6CO2 + 6H2O --> C6H12O6 + 6O2