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: Anatomy
[{'content': 'The arachnoid villi responsible for cerebrospinal fluid absorption protrude mainly in the: \nSelect and explain. \nA. Superior sagittal sinus, B. Inferior sagittal sinus, C. Straight sinus, D. Transverse sinus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Superior saggital sinus', 'role': 'assistant'}]