Given below are two statements. One is labelled Assertion(A) and the other is labelled Reason(R).

Assertion (A) : Miller proved the theory of chemical evolution experimentally.

Reason (R) : He observed the formation of amino acids when he simulated the conditions of primitive Earth in the laboratory.

In light of above statements, choose the correct answer from the options given below.

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Assertion (A): "Miller proved the theory of chemical evolution experimentally."
This assertion is true. Miller's experiment in 1953 demonstrated that organic molecules, including amino acids, could be formed under conditions resembling those of early Earth. This provided experimental evidence supporting the theory of chemical evolution, which posits that life originated from non-living matter through a series of chemical reactions.

Reason (R): "He observed the formation of amino acids when he simulated the conditions of primitive Earth in the laboratory."
This reason is also true and directly supports Assertion (A). Miller simulated the conditions of primitive Earth by creating an environment containing gases like methane, ammonia, hydrogen, and water vapor, and subjected them to electrical discharge. In doing so, he observed the formation of various organic molecules, including amino acids, which are the building blocks of proteins and essential for life.