Assertion (A): Patents are granted by government to an inventor. Reason (R): Patents prevents others from commercial use of an invention.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A).
(C) (A) is true, but (R) is false.
(D) (A) is false, but (R) is true.