During photosynthesis, the oxygen gas comes from

CO₂

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Water

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Both CO₂and water

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Oxygen via air

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Solution

The correct option is B
Water

The correct option is B:
The process of photosynthesis requires CO₂, water, sunlight and chlorophyll.
During photosynthesis, the oxygen gas comes from water.
The plants absorb water from soil and also take in carbon dioxide from the atmosphere during photosynthesis.

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