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: Anatomy
[{'content': 'Ewing sarcoma clinically mimics \nSelect and explain. \nA. Osteomyelitis, B. Osteochondroma, C. Osteosclerosis, D. Heterotopic ossification', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ewing sarcoma is one of the differential diagnosis for Subacute osteomyelitis ref : maheswari 9th ed', 'role': 'assistant'}]