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
[{'content': "New Periosteal bone formation can be seen in: \nSelect and explain. \nA. Ewing's sarcoma., B. Caffey disease., C. Garre's osteomyelitis., D. All of the above.", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]