The equation that describe the overall changes taking place during photosynthesis is
6Co2+6H2O C6H12O6+ 6 O2 (answer B)
during photosynthesis plant uses carbon(iv) oxide (CO2) water (H2O) and light energy to produce glucose (C6H12O6) and oxygen. The light energy which is absorbed by green chemical known as chlorophyll is used to convert CO2 and H2O into glucose.