This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
[{'content': 'When is Copper T ideally inseed \nSelect and explain. \nA. Just before menstruation, B. During Menstruation, C. Just after menstruation, D. On the 14th day', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The most propitious time for inseion of Cu T is during menstruation or within 10 days of the beginning of menstrual period Inseion is technically easy during this period because the diameter of the cervical canal is greater at this time than the secretory phase Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 498', 'role': 'assistant'}]