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': 'Pyrexia due to wound infection commonly occursafter- \nSelect and explain. \nA. Third post operation day, B. Fifth post operation day, C. Seventh post operation day, D. Second post operation day', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Fifth post operation day "Wound infections most commonly occur 5 to 6 days post operatively but may present sooner or later than that" -Sabiston.', 'role': 'assistant'}]