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: ENT
Acoustic neuroma commonly affects the: 
Select and explain. 
A. 5th cranial nerve, B. 6th cranial nerve, C. 7th cranial nerve, D. 8th cranial nerve
D: 8th cranial nerve
Answer: D: 8th cranial nerve 
Explanation: Acoustic neuromas are slow-growing tumors that can eventually cause a variety of symptoms by pressing against the eighth cranial nerve. Hearing loss in one ear (the ear affected by the tumor) is the initial symptom in approximately 90 percent of patients.