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
Fluid levels are seen in? 
Select and explain. 
A. ABC, B. Telangiectatic osteosarcoma, C. Malignant fibrous osteosarcoma, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: 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