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: Surgery
[{'content': 'Watson criteria is used for \nSelect and explain. \nA. Treatment for tracheoesophageal fistula, B. Diagnosis of tracheoesophageal fistula, C. Diagnosis of peptic ulcer, D. Prognosis of esophageal cancer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]