This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnostic and operative ENT, Subject name: ENT
[{'content': 'Tympanoplasty is mainly used for \nSelect and explain. \nA. Otosclerosis, B. CSOM, C. ASOM, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CSOM is usually associated with tympanic membrane and ossicular damage. These are managed by tympanoplasty which includes myringoplasty and ossicular reconstruction Re: Textbook of Ear, Nose and Throat, Dhingra, 6th Edition', 'role': 'assistant'}]