system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
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
assistant
The correct answer is  None