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': 'MIC-2- Marker of - \nSelect and explain. \nA. Ewing sarcoma, B. Osteosarcoma, C. Dermatofibrous protruberans, D. Alveolar cell sarcoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Ewing sarcoma', 'role': 'assistant'}]