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Question

The source of O2 liberated during photosynthesis is

A
Photosynthetic enzyme.
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B
Carbohydrate present in leaf.
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C
Water.
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D
Carbon dioxide.
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Solution

The correct option is D Water.
In light reaction, the energy of the light is used to split water which produces two electrons, two hydrogen ions, and oxygen. The electrons released during the photolysis is generally captured by photosystem II during the light dependent reaction.
So, the correct answer is option C.

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