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
All are true about patients with neuro fibromatosis except that they are prone for - 
Select and explain. 
A. Gliomas, B. Retinoblastoma, C. Swachonoma, D. Meningioma
B: Retinoblastoma
Answer: B: Retinoblastoma 
Explanation: None