The correct option is C A.I. Oparin and J.B.S. Haldane
The theory of chemical evolution was given by A.I. Oparin and J.B.S. Haldane. According to this theory, the first form of life could have come from pre-existing non-living organic molecules such as RNA, protein, etc., and the formation of life was preceded by chemical evolution, i.e., formation of diverse organic molecules from inorganic constituents.