This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pathology
[{'content': 'Most common CNS tumor associated with NF-1 is? \nSelect and explain. \nA. Optic nerve glioma, B. Meningioma, C. Medulloblastoma, D. Ependymoma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Optic nerve glioma * Optic nerve glioma is one of the diagnostic sign of NF-1.", 'role': 'assistant'}]