Which was absent in the atmosphere at the tim | vedclass

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(C) The primitive atmosphere of the Earth was reducing in nature,consisting primarily of methane $(CH_{4})$,ammonia $(NH_{3})$,hydrogen $(H_{2})$,and

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$O_{2}$

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(C) The primitive atmosphere of the Earth was reducing in nature,consisting primarily of methane $(CH_{4})$,ammonia $(NH_{3})$,hydrogen $(H_{2})$,and water vapor $(H_{2}O)$.Free oxygen $(O_{2})$ was absent in the early atmosphere because it was highly reactive and would have oxidized the organic molecules necessary for the origin of life.

Which was absent in the atmosphere at the time of origin of life?

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