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(D) The correct answer is $(d)$.In $1953$,Stanley Miller and Harold Urey experimentally demonstrated the conditions of the primitive Earth.They create

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Both $(b)$ and $(c)$

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(D) The correct answer is $(d)$.In $1953$,Stanley Miller and Harold Urey experimentally demonstrated the conditions of the primitive Earth.They created a closed system simulating the primitive atmosphere,which consisted of methane $(CH_4)$,ammonia $(NH_3)$,water vapor $(H_2O)$,hydrogen $(H_2)$,and some carbon monoxide $(CO)$ and carbon dioxide $(CO_2)$.This setup was a reducing atmosphere,and they successfully synthesized amino acids,proving that organic molecules could be formed from inorganic precursors under these conditions.

Primitive conditions of the Earth were experimentally shown by

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