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': 'The female urethra measures about : \nSelect and explain. \nA. 15 mm, B. 20 mm, C. 25 mm, D. 35 mm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 35 mm', 'role': 'assistant'}]