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': 'Gold standard surgical procedure for prevention of cheonic aspiration is \nSelect and explain. \nA. Thyroplasty, B. Tracheostoncy, C. Tracheal diversion and permanent tracheostomy, D. feeding gastrostomy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]