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': 'Most common complication of acute otitis media in children - \nSelect and explain. \nA. Deafness, B. Mastoiditis, C. Cholesteatoma, D. Facial nerve palsy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common complication following ASOM is mastoiditis.\nFacial nerve palsy is an uncommon complication of ASOM.', 'role': 'assistant'}]