(A): Mutations are always beneficial.
(R): Generally it produces offsprings with advantageous features.

Options

A. If both (A) and (R) are true and (R) is the correct explanation of (A).
B. If both (A) and (R) are true but (R) is not the correct explanation of (A).
C. If (A) is true but (R) is false.
D. If both (A) and (R) are false.

Answer

D