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': 'Schwaz operation is also called as \nSelect and explain. \nA. Coical mastoidectomy, B. Modified radical mastoidectomy, C. Radial mastoidectomy, D. Fenestration operation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Schwaz operation is also called as simple Mastoidectomy or coical Mastoidectomy Re: Textbook of Ear, Nose and Throat, Dhingra, 6th Edition', 'role': 'assistant'}]