This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen: Miscellaneous, Subject name: Anatomy
[{'content': 'Deep venous system of brain consists of: \nSelect and explain. \nA. Internal cerebral vein, B. Great cerebral vein, C. Straight sinus, D. Cavernous sinus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The deep venous system consists of the Internal Cerebral vein, and in some sense the Basal Vein of Rosenthal.', 'role': 'assistant'}]