This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Management of Wounds, Subject name: Surgery
[{'content': 'Surgery for elective hemicolectomy for carcinoma colon is described as - \nSelect and explain. \nA. Clean, B. Clean contaminated, C. Dirty, D. Contaminated', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Clean contaminated", 'role': 'assistant'}]