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: Physiology
[{'content': 'CSF production per minute \nSelect and explain. \nA. 0.30 - 0.35 ml/min, B. 0.5 ml/min, C. 2 ml/min, D. 1ml/min', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 500-550ml/day', 'role': 'assistant'}]