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': 'Primary closure of incised wounds must be done within: \nSelect and explain. \nA. 2 hours, B. 4 hours, C. 6 hours, D. 12 hours', 'role': 'user'}, {'content': 'Answer: C \nExplanation: WOUNDS CAN BE CLOSED BY \n\nPrimary suture: \n\n\xa0 - Clean wounds\n\xa0 - Selected contaminated wounds after thorough wound toileting and debridement\n\nDelayed primary suture:\n\n\xa0- Heavily contaminated wounds\n\xa0- Wounds in which wound toileting has been delayed for 6-8 hours\n\nLeft open to heal by secondary closure', 'role': 'assistant'}]