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': 'The most common tumour of cerebellopontine angle is \nSelect and explain. \nA. Meningioma, B. Acoustic neuroma, C. Neurofiroma, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Acoustic neuroma comprises 80% of all cerebellopontine angle tumours. Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 125', 'role': 'assistant'}]