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': 'Flame cells are seen in - \nSelect and explain. \nA. Multiple myleoma, B. Ewings sarcoma, C. Luekemia, D. Osteosarcoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]