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
[{'content': 'Acoustic neuroma causes the following except- \nSelect and explain. \nA. Ptosis, B. Nystagmus, C. Unilateral deafness, D. Loss of corneal reflex', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]