This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Obs), Subject name: Gynaecology & Obstetrics
[{'content': 'Puerperium is the period: \nSelect and explain. \nA. 6 wks. following delivery, B. 3 wks. following delivery, C. 1 wk. following delivery, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. 6wks following deliveryPuerperium begins as soon as the placenta is expelled and lasts for approximately 6wks when the uterus becomes regressed almost to the nonpregnant size.', 'role': 'assistant'}]