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
[{'content': 'Myositis ossificans is due to: \nSelect and explain. \nA. Ossification, B. New bone formation, C. Ossification of subperiosteal haematoma, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. All', 'role': 'assistant'}]