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': 'Placental site involution takes \nSelect and explain. \nA. 2 weeks, B. 3 weeks, C. 6 weeks, D. 8 weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Complete placental site involution takes upto 6 weeks.', 'role': 'assistant'}]