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': 'Which of the following does not suggest postoperative infection? \nSelect and explain. \nA. Increase in temperature, B. Swelling, C. Pain, D. Pitting edema', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]