This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
[{'content': 'Maximum amount of CSF is found in? \nSelect and explain. \nA. Ventricular system, B. Subarachnoid space, C. Epdural space, D. Sub-pial space', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CSF is a clear, colorless and slightly alkaline fluid which is almost cell-free.In an adult, the total volume of CSF is about 150 ml, out of which only 30 ml is in the ventricular system and the remainder is in the subarachnoid space.(Ref : Vishram Singh textbook of clinical neuroanatomy second edition pg 194)', 'role': 'assistant'}]