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': 'A-7 year child presenting with acute otitis media, does not respond to ampicillin. Examination reveals full and bulging tympanic membrane, the treatment of choice is: \nSelect and explain. \nA. Sytemic steroid, B. Ciprofloxacin, C. Myringotomy, D. Coical mastoidectomy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Indications of myringotomy in acute otitis media:Drum is bulging + acute pain.Incomplete resolution despite antibiotics when drum remains full with persistent conductive deafness.Persistent effusion beyond 12 weeks.', 'role': 'assistant'}]