This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal System, Subject name: Radiology
[{'content': 'Fluid levels are seen in? \nSelect and explain. \nA. ABC, B. Telangiectatic osteosarcoma, C. Malignant fibrous osteosarcoma, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans DFluid levels can be seen in following conditions Benign:* Aneurysmal bone cyst* Chondroblastoma* Giant cell tumor* Simple bone cyst* Fibrous dysplasia Malignant:* Telangiectatic osteosarcoma* Malignant fibrous histiocytoma* Any necrotic bone tumor', 'role': 'assistant'}]