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: Orthopaedics
[{'content': 'Not true about Osteosarcoma \nSelect and explain. \nA. Associated with Hyperglycemia, B. Sun burst appearance on x-ray, C. Pulsatile bone tumor, D. Osteitis imperfecta has increased risk of transforming into osteosarcoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]