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
Neurofibromatosis I is most commonly associated with 
Select and explain. 
A. Brain stem gliomas, B. Optic pathway glioma, C. Sub ependymal pilocytic astrocytoma, D. Glioblastoma multiforune
B: Optic pathway glioma
Answer: B: Optic pathway glioma 
Explanation: Robbins and cotran Pathologic basis of disease-south asia edition, 9 edition * NF1 is characterised by neurofibromas of peripheral nerve, gliomas of optic nerve,Lisch nodules and cafe au lait spots.