This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
[{'content': 'Which of the following statement about VHL syndrome is true? \nSelect and explain. \nA. Multiple tumors are rarely seen, B. Craniospinal hemangioblastoma are common, C. Supratentorial tumors are common, D. Tumors of Schwann cells are common', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Craniospinal hemangioblastoma are commonRef: Sabiston 19th edition page 708Von Hippel Lindau Syndrome:* Autosomal dominant* Multiple vascular tumors in many organs* Hemangioblastomas of Retina and CNS* Renal cysts, Cysts in Epididymis, Liver and Pancreas* Clear cell RCC* Pheochromocytoma* Pancreatic endocrine tumors* Adrenal cancers* Polycythemia is a characteristic feature of VHL due to erythropoietin production by hemangioblastoma', 'role': 'assistant'}]