Question

Which of the following substances is used up during photosynthesis A. Oxygen B sugar C sulfur dioxide D water

Answer 1

A. and if its not that than its B.... It actually should be B. Just choose between those two.

Answer 2

The equation for phosynthesis is 6Co2 + 6H20 -> C6H12O6+ 6O2.

Therefore, CO2 and H20 are consumed or used up by the reaction.