Question : Oxygen liberated during photosynthesis comes from:
Option 1: Carbon dioxide
Option 2: Water
Option 3: Breakdown of chlorophyll
Option 4: Atmosphere
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Correct Answer: Water
Solution : The correct answer is Water.
Photosynthesis is the process by which green plants synthesise their food from Carbon dioxide and Water in the presence of sunlight. In this process, oxygen is released as a byproduct of the reaction. Hydraulic breakdown of the water molecules releases oxygen molecules, which are then used in photosynthesis.
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