Some processes in the carbon cycle are illustrated below. 1. glucose $+$ oxygen $\rightarrow$ carbon dioxide $+$ water 2. carbon dioxide $+$ water $\rightarrow$ glucose $+$ oxygen 3. methane $+$ oxygen $\rightarrow$ carbon dioxide $+$ water What are the names given to these processes?
- Acombustion; respiration; photosynthesis
- Bphotosynthesis; combustion; respiration
- Crespiration; combustion; photosynthesis
- Drespiration; photosynthesis; combustion