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': "Sunray appearance on X-ray is seen in: \nSelect and explain. \nA. Osteogenic sarcoma, B. Ewing's sarcoma, C. Multiple myeloma, D. Osteoclastoma", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Osteogenic sarcoma', 'role': 'assistant'}]