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
Commonly involved muscle of face in Myositis ossificans: 
Select and explain. 
A. Buccinator., B. Masseter., C. Lateral pterygoid., D. Temporalis.
B: Masseter.
Answer: B: Masseter. 
Explanation: None