The source of oxygen evolved during photosynthesis is

A. CO₂

B. H₂O

C. Carbohydrate

D. Photosynthetic curve

Answer: Option B

Solution(By Examveda Team)

The source of oxygen that evolved during photosynthesis is H₂O.
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy, through cellular respiration.
Two water molecules are oxidized by the energy of four successive charge-separation reactions of photosystem II to yield a molecule of diatomic oxygen and four hydrogen ions. The oxidation of water is catalyzed in photosystem II by a redox-active structure.