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
The most common reason for the removal of impacted mandibular third molars: 
Select and explain. 
A. Referred pain, B. Orthodontic treatment, C. Recurrent pericoronitis, D. Chronic periodontal disease
C: Recurrent pericoronitis
Answer: C: Recurrent pericoronitis 
Explanation: None