The diagram represents a palisade mesophyll cell taken from a green leaf. In which labelled part does photosynthesis take place, and where is starch kept?
- Aphotosynthesis occurs in X, starch is stored in W
- Bphotosynthesis occurs in X, starch is stored in Z
- Cphotosynthesis occurs in Y, starch is stored in X
- Dphotosynthesis occurs in Y, starch is stored in Y