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: Dental
In the following periodontal surgeries the one that is
performed first: 
Select and explain. 
A. Infrabony pocket therapy, B. Gingivectomy, C. Apically displaced flap, D. Gingivoplasty
A: Infrabony pocket therapy
Answer: A: Infrabony pocket therapy 
Explanation: None