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': 'Urine production begins : \nSelect and explain. \nA. 2 months of age, B. 4 months of age, C. At term, D. Just after delivery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 4 months of age', 'role': 'assistant'}]