This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal Radiology, Subject name: Radiology
An osteolytic mass over the iliac bone showing mottled popcorn calcifications in a 45 year old male suggests? 
Select and explain. 
A. Osteosarcoma, B. Chondrosarcoma, C. Metastasis, D. Osteoclastoma
B: Chondrosarcoma
Answer: B: Chondrosarcoma 
Explanation: Popcorn Calcification on Iliac Bone(Flat Bone)-CHONDROSARCOMA