This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
[{'content': 'All are true about patients with neurofibromatosis except that they are prone for: \nSelect and explain. \nA. Gliomas, B. Retinoblastoma, C. Schwannoma, D. Meningioma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: bRef: Harrison, 16thed, p. 2457', 'role': 'assistant'}]