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
CSF is absorbed by - 
Select and explain. 
A. Choroid plexus, B. Sub-arachnoid granulations, C. Dura matter, D. Pia matter
B: Sub-arachnoid granulations
Answer: B: Sub-arachnoid granulations 
Explanation: 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.