Which of following was most likely to have been absent in free form in primordial atmosphere at time

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6.Evolution

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Which of the following was most likely to have been absent in free form in the primordial atmosphere at the time of origin of life

A${O_2}$

B$C{H_4}$

C${H_2}$

D$N{H_3}$

Solution

It’s Obvious

Standard 12

Biology

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(AIIMS-2015)