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
Which one of the following surgical procedures is considered to have a clean- contaminated wound? 
Select and explain. 
A. Elective open cholecystectomy for cholelithiasis, B. Herniorrhaphy with mesh repair, C. Lumpectomy with axillary node dissection, D. Appendectomy with walled off abscess
A: Elective open cholecystectomy for cholelithiasis
Answer: A: Elective open cholecystectomy for cholelithiasis 
Explanation: .Elective open cholecystectomy for cholelithiasis is clean contaminated Hernioplasty and mastectomy or clean Appendicetomy with controlled infection is contaminated,