This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Cranial nerve which is involved earliest in acoustic neuroma is \nSelect and explain. \nA. 5, B. 7, C. 9, D. 10', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The earliest cranial nerve to be involved is V nerve causing reduced corneal sensitivity. Ref: Dhingra 6th edition pg. 112', 'role': 'assistant'}]