Which of the following was NOT present in a f | vedclass

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(C) According to the Oparin-Haldane hypothesis and the Miller-Urey experiment,the early atmosphere of the Earth was reducing in nature. It contained g

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Oxygen

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(C) According to the Oparin-Haldane hypothesis and the Miller-Urey experiment,the early atmosphere of the Earth was reducing in nature. It contained gases like $CH_4$,$NH_3$,$H_2$,and water vapor. Free oxygen $(O_2)$ was absent in the primitive atmosphere because it was highly reactive and would have immediately combined with other elements to form oxides,preventing the chemical evolution of life.

Which of the following was $NOT$ present in a free form during the origin of life?

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