This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hernia, Subject name: Surgery
[{'content': 'Which is a clean surgery among the following? \nSelect and explain. \nA. Hernia surgery, B. Gastric surgery, C. Cholecystectomy, D. Rectal surgery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Hernia surgery(Ref: Sabiston 20th 224 -225)* Hernia Surgery is a clean surgery. Clean surgery is in which operative wound is un infected. No inflammation is encountered', 'role': 'assistant'}]