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
Myositis ossificans is due to: 
Select and explain. 
A. Ossification, B. New bone formation, C. Ossification of subperiosteal haematoma, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: D i.e. All