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: Pathology
The tooth most commonly involved in chronic focal sclerosing osteomyelitis is 
Select and explain. 
A. Maxillary second molar, B. Maxillary third molar, C. Maxillary first molar, D. Mandibular first molar
D: Mandibular first molar
Answer: D: Mandibular first molar 
Explanation: None