The first organisms to evolve on Earth were-

Two statements regarding the origin of life are given below:
$(a)$ The first organisms that emerged on Earth are believed to have been devoid of chlorophyll and incapable of respiration.
$(b)$ The first food-producing organisms were chemosynthetic and never released oxygen.
Based on the above statements,which of the following options is correct?

Organic compounds first evolved on Earth,which were required for the origin of life,were:

Stanley Miller had put the Oparin-Haldane theory to test in $1953$ by creating in the laboratory the probable conditions on the primitive earth. In the experiment,simple amino acids were synthesized from which of the following mixtures,as observed after eighteen days?

The primitive or early atmosphere was composed of which mixture?

According to Oparin's theory,what did the primitive atmosphere of the Earth contain?