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(C) Stanley Miller and Harold Urey conducted an experiment in $1953$ to test the Oparin-Haldane hypothesis regarding the origin of life.They created a

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$NH_3, H_2, CH_4$

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(C) Stanley Miller and Harold Urey conducted an experiment in $1953$ to test the Oparin-Haldane hypothesis regarding the origin of life.They created a simulated primitive atmosphere in a closed apparatus.The mixture of gases used in the reaction chamber consisted of methane $(CH_4)$,ammonia $(NH_3)$,and hydrogen $(H_2)$ in a ratio of $2:1:2$,along with water vapor $(H_2O)$.They avoided using free oxygen $(O_2)$ because the primitive atmosphere was considered to be reducing,not oxidizing.Therefore,the correct combination of gases is $NH_3, H_2, CH_4$.

In his experiment,Miller used a specific mixture of gases in the reaction chamber. Which of the following combinations did he use?

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