This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Which one of the following surgical procedures is considered to have a clean- contaminated wound? \nSelect and explain. \nA. Elective open cholecystectomy for cholelithiasis, B. Herniorrhaphy with mesh repair, C. Lumpectomy with axillary node dissection, D. Appendectomy with walled off abscess', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .Elective open cholecystectomy for cholelithiasis is clean contaminated Hernioplasty and mastectomy or clean Appendicetomy with controlled infection is contaminated,', 'role': 'assistant'}]