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: Orthopaedics
In myositis ossificans mature bone is seen - 
Select and explain. 
A. At periphery, B. In center, C. Whole muscle mass, D. In the joint capsule
A: At periphery
Answer: A: At periphery 
Explanation: Zonation from the central immature zone of undifferentiated highly active cells to the peripheral mature zone of well-oriented bone is characteristic.