The correct option is D Haldane
Primordial soup
In the oceans of primitive Earth appeared soup like broth of chemicals. This broth is referred to as primordial soup by Haldane.
The primordial soup was hot due to the high temperature of Earth where organic compounds and primitive life forms originated from inorganic compounds mainly water, hydrogen, methane, ammonia, and carbon dioxide.
Urey
Urey along with Miller demonstrated the formation of organic compounds spontaneously.
Oparin
Oparin gave the chemical theory of origin of life.
Final answer
(a) Haldane