Oral contraceptive pills have to be taken daily for a period of .….a….. Starting preferably within the first …..b….. Of menstrual cycle.
After a gap of …..c….. Days (during which menstruation occurs) it has to be repeated in the same pattern till the female desires to prevent conception.

Options

A. a-28 days, b-7days, c-5 days
B. a-21 days, b-5 days, c-7 days
C. a-21 days, b-7 days, c-7 days
D. a-14 days, b-5 days, c-7 days

Answer

B

Explanation

Oral contraceptive pills have to be taken daily for a period of 21 days starting preferably within the first 5 days of menstrual cycle.
After a gap of 7 days (during which menstruation occurs) it has to be repeated in the same pattern till the female desires to prevent conception.