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: Pathology
Bilateral acoustic neuroma is classical of? 
Select and explain. 
A. NF - 1, B. NF - 2, C. Tuberous sclerosis, D. VHL syndrome
B: NF - 2
Answer: B: NF - 2 
Explanation: Bilateral accoustic neuroma is very classical of NF - 2 which occurs due to mutation in NF - 2 gene on chromosome 22.