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': 'Tributaries of cavernous sinus are all except - \nSelect and explain. \nA. Inferior cerebral vein, B. Central vein of retina, C. Sphenoparietal sinus, D. Superior cerebral vein', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans-D', 'role': 'assistant'}]