This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'How much is the normal intracranial pressure? \nSelect and explain. \nA. 30 mm of water, B. 50 mm of water, C. 130 mm of water, D. 300 mm of water', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) 130 mm waterREF: Guyton 12th ed pg 747The normal intracranial or CSF pressure is between 65-195 mm of water. Approximately 130 mm of water (10 mm Hg)', 'role': 'assistant'}]