Assertion : Intra-uterine devices (IUDs) are very effective contraceptive method.
Reason : IUDs do not allow sperms to enter uterus.
A. If both Assertion and Reason are true but the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true but Reason is false, then mark (3).
D. If both Assertion and Reason are false, then mark (4).