Answer :
The source of the oxygen released into the air as a product of photosynthesis is C) Water only.
Water is the only source of the oxygen released into the air as a product of photosynthesis.
About photosynthesis
The plants absorbs water and carbon dioxide during photosynthesis.
The solar energy in converted into chemical energy in the chloroplast and formation of water and carbohydrate occurs.
Carbohydrate is stored as energy and water splits into oxygen by hydrolysis and get released into the atmosphere.
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