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
Berger flap procedure is used for 
Select and explain. 
A. TMJ ankylosis, B. TMJ dislocation, C. Oro-antral communication, D. Pericoronitis
C: Oro-antral communication
Answer: C: Oro-antral communication 
Explanation: None