The correct option is D 6CO2+12H2O→C6H12O6+6H2O+6O2
Photosynthesis is an enzyme regulated anabolic process which involves the synthesis of organic compounds, inside the chlorophyll containing cells, from CO2 and H2O with the help of sunlight as a source of energy. Oxygen evolved during photosynthesis comes from water. The equation for photosynthesis can be summarised as follows:
6CO2+12H2O Chlorophyll−−−−−−−→Sunlight C6H12O6+6H2O+6O2