Methane reacts with chlorine by substitution and also undergoes complete combustion in excess oxygen. Which row correctly describes these two reactions?
- ACondition: an acid catalyst; Equation: methane + oxygen $\rightarrow$ carbon dioxide + hydrogen
- BCondition: an acid catalyst; Equation: methane + oxygen $\rightarrow$ carbon dioxide + water
- CCondition: ultraviolet light; Equation: methane + oxygen $\rightarrow$ carbon dioxide + hydrogen
- DCondition: ultraviolet light; Equation: methane + oxygen $\rightarrow$ carbon dioxide + water