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
[{'content': 'A 68-year-old man has many months history of progressive hearing loss, unsteady gait, tinnitus, and facial pain. An MRI scan reveals a tumor at the cerebellopontine angle. Which of the following cranial nerves is this tumor most likely to affect? \nSelect and explain. \nA. fourth cranial nerve, B. sixth cranial nerve, C. eighth cranial nerve, D. tenth cranial nerve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: An acoustic neuroma is most likely to lead to a palsy of the eighth cranial nerve. Deafness, headache, ataxia, tinnitus, and diplopia are seen, as well as facial paresthesia. Acoustic neuromas represent 5-10% of all intracranial tumors. They develop from Schwann cells and generally grow very slowly. They may be very large before symptoms develop.', 'role': 'assistant'}]