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Byju's Answer
Standard X
Chemistry
Life and How It's Formed
Select the on...
Question

Select the one which was not found during the origin of life.

A
Ammonia
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B
Methane
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C
Oxygen
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D
Hydrogen
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Solution

The correct option is C Oxygen
Oxygen was generated as a byproduct of cyanobacterial photosynthesis as early as 3 billion years ago, only.

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