This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Hysterosalphingography is performed in which phase of mentrual cycle? \nSelect and explain. \nA. During menstruation, B. Luteal phase, C. Follicular phase, D. Secretory phase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A hysterosalpingography should be performed only in the follicular phase of the menstrual cycle after cessation of menstrual bleeding till ovulation (days 6-12 of the menstrual cycle) to avoid X-ray radiation during undiagnosed early pregnancy.', 'role': 'assistant'}]