This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'Most common type of optic nerve glioma is \nSelect and explain. \nA. Protoplasmic, B. Pilocytic, C. Gemistocytic, D. Fibrous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pilocytic means that the tumor cells are hair like. pilocytic astrocytoma is the most common type Refer khurana 6/e 410', 'role': 'assistant'}]