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Plant Pathology
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The source of oxygen evolved during photosynthesis is

Answer & Solution
Correct Answer: Option B
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.
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