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': 'In retroveed gravid Uterus, Urinary retention usually appears at : \nSelect and explain. \nA. 6-8 weeks, B. 8-10 weeks, C. 12-14 weeks, D. 20-24 weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 12-14 weeks', 'role': 'assistant'}]