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': 'Von Hippel Lindau is associated with all except - \nSelect and explain. \nA. Endo lymphatic sac tumors, B. Hemangioendotheliomas, C. Pheochromocytoma, D. Islet cell tumors', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]