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: Medicine
[{'content': 'CSF is absorbed by - \nSelect and explain. \nA. Choroid plexus, B. Sub-arachnoid granulations, C. Dura matter, D. Pia matter', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Sub-arachnoid granulationsCSF is produced by the choroid villi in the lateral ventricles and third ventricles.CSF is reabsorbed the arachnoid granulations back into the blood stream.', 'role': 'assistant'}]