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': 'CSF pressure depends primarily upon? \nSelect and explain. \nA. Rate of formation from choroid plexus, B. Rate of absorption, C. Cerebral blood flow, D. Blood pressure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Rate of absorptionCSF pressure depends primarily upon Rate of absorption because the rate of the formation is fairly constant.', 'role': 'assistant'}]