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
Healing of the extraction socket in which flaps are approximated: 
Select and explain. 
A. Healing by primary intention, B. Healing by secondary intention., C. Healing by tertiary intention, D. Any of the above.
A: Healing by primary intention
Answer: A: Healing by primary intention 
Explanation: Healing of socket in which the flaps are approximated following removal of tooth occurs by primary intention.