Assertion(A): Periodic abstinence is a natural method, where couples abstain from coitus.
Reason(R): Coitus from day 5-10 of menstruation should be avoided, because this is the time of ovulation.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.