Choose the incorrect statement w.r.t. oral contraceptive pills

Options

A. These are combination of progestogen and estrogen
B. These have to be taken only on alternate days for a period of 21 days in menstrual cycle
C. They inhibit ovulation and implantation
D. They alter the quality of cervical mucus to prevent/retard entru of sperms

Answer

B

Explanation

Minipills should be taken daily
Pills have to be take daily for a period of 21 days starting preferably within the first five days of menstrual cycle