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: Radiology
[{'content': 'Radiographically a ragged or poorly defined margin is seen in \nSelect and explain. \nA. squamous cell carcinoma, B. osteomyelitis, C. secondarily infected cyst, D. all of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]