Mechanism of action of an oral contraceptive containing a combination of oestrogen-progestin is the following except-a) Inhibition of ovulationb) A change in the cervical mucusc) Inhibition of motility of the uterine tubesd) Inhibition of motility of spermse) Changes in the uterine endometrium: (A) ab, (B) cd, (C) bd, (D) ac
Answer is B. None