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 pressure (lumbar) \nSelect and explain. \nA. 70 - 180 mm CSF, B. 50 - 100 mm CSF, C. > 200 mm CSF, D. 150 - 200 mm CSF', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 5-15mmHg OR 65- 200 mm CSF/water', 'role': 'assistant'}]