This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Eustachian Tube, Subject name: ENT
[{'content': 'Procedure for serous otitis media is: \nSelect and explain. \nA. Tympanoplasty, B. Mastoidectomy, C. Myringotomy, D. Stapedotomy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (c) Myringotomy(Ref. Scott Brown, 8th ed., Vol 2; 125)Tympanoplasty constitutes surgical repair of the TM, i.e. myringoplasty along with replacement of ossicles, i.e. ossiculoplasty and is the procedure for CSOM.', 'role': 'assistant'}]