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: Unknown
[{'content': 'CSF is except \nSelect and explain. \nA. Formed mainly in choroid plexus, B. 10% drain cerebral lymphatics, C. Flow from lateral ventricles through, D. Mostly found in pelvic bones than in spine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cerebro spinal fluid\n\nClear colorless bodily fluid found in the brain and spine\nProduced in the choroid plexus of the brain\nActs as a cushion or buffer for the cortex, providing a basic mechanical and immunological protection to the brain inside the skull\nServes a vital function in cerebral autoregulation of cerebral blood flow.\nOccupies the subarachnoid space (the space between the arachnoid mater and the pia mater) and the ventricular system around and inside the brain and spinal cord.\nConstitutes the content of the ventricles, cisterns, and sulci of the brain, and central canal of the spinal cord.\n\nCirculation of CSF', 'role': 'assistant'}]