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Layers of Earth

There was no ...

Question

There was no free oxygen in the early atmosphere, because most of it was tied up in

A

Water

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B

Ammonia

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C

Methane

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D

Rock

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Solution

The correct option is C Water
Oxygen is evolved from water during the process of photosynthesis through photolysis. As initially, there were no photosynthesizers, most of the oxygen remained with water itself.

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