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
Primary closure of incised wounds must be done within 
Select and explain. 
A. 2 hrs, B. 4 hrs, C. 6 hrs, D. 12 hrs
C: 6 hrs
Answer: C: 6 hrs 
Explanation: • Primary suture:
−− Clean wounds
−− Selected contaminated wounds after thorough wound toileting and debridement
• Delayed primary suture:
−− Heavily contaminated wounds
−− Wounds in which wound toileting has been delayed for 6–8 hours
• Left open to heal by secondary closure