The correct option is C Oparin
Oparin
Oparin was a Russian scientist who gave the modern theory or chemical theory of the origin of life.
Haldane
Haldane was an English and had a similar view about the origin of life like Oparin.
Miller
Stanley Miller was an American and he demonstrated that electric discharge when passed through a mixture of methane, ammonia, hydrogen and water vapour produced complex organic compounds. He proved the chemical evolution theory through an experiment.
Fox
Sidney Fox was an American who demonstrated the formation of polypeptide from a mixture of amino acids.
Final answer
(a) Oparin