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': 'False about Giant cell tumor \nSelect and explain. \nA. Sun ray apppearance on x-ray, B. Epiphyseal tumor, C. Soap bubble appearance on x-ray, D. Treated with extended currettage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]