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': 'Uterine-cervix ratio up to 10 years of age: \nSelect and explain. \nA. 3:02, B. 2:01, C. 3:01, D. 1:02', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The relationship of the length of the cervix and that of the body of uterus varies with age.', 'role': 'assistant'}]