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: Unknown
Neurofibromatosis 1 criteria except 
Select and explain. 
A. Brain tumor, B. Acoustic neuromas, C. Pseudoarthrosis, D. Café-au-lait spots
B: Acoustic neuromas
Answer: B: Acoustic neuromas 
Explanation: Ref. API Textbook of Medicine. Pg. 219