For the Assertion (A) and Reason (R) given below, choose the correct option:
Assertion (A): Vaccines prevent diseases.
Reason (R): Vaccines must be given to children.
(a)Both (A) and (R) are true and (R) is the correct explanation of (A).
(b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).