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
After multiple tooth extraction, suture is placed at: 
Select and explain. 
A. Interdental septum, B. Across the socket, C. Adjacent tooth, D. None of the above
A: Interdental septum
Answer: A: Interdental septum 
Explanation: None