The correct option is C CH4, H2, NH3, H2O
S.L. Miller produced amino acids by mixing CH4, H2, NH3 and water vapour at 800°C.
Oparin and Haldane proposed a hypothesis. According to this hypothesis, the first form of life came from pre-existing non-organic molecules.
S.L. Miller supported their proposal. He created Earth's reducing atmosphere during the early days of development.
He created electric discharge in a closed flask containing methane, hydrogen, ammonia, and water vapour at 8000C. This resulted in the formation of amino acids.
Thus, the correct answer is (C).