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
The treatment for acute periodontal abscess is 
Select and explain. 
A. The drainage of abscess through incision only, B. Incision & drainage followed by flap surgery after the symptoms subside, C. Incision should not be given through ultrasonic tip, D. Incision should be given only external level
A: The drainage of abscess through incision only
Answer: A: The drainage of abscess through incision only 
Explanation: None