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': 'Killian&;s incision is used for \nSelect and explain. \nA. Septoplasty, B. Myringotomy, C. Proof puncture, D. Modified radical mastoidectomy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Killian&;s incision is used for septoplasty Killians incision in case of deted nasal septum, make a slightly curvilinear incision, 2-3mm above the caudal end of septal cailage on the concave side . Re: Textbook of Ear, Nose and Throat, Dhingra, 6th Edition; Pg no: 416', 'role': 'assistant'}]