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
Popcorn calcification is seen in 
Select and explain. 
A. Adamantinoma, B. Osteosarcoma, C. Multiple myeloma, D. Chondrosarcoma
D: Chondrosarcoma
Answer: D: Chondrosarcoma 
Explanation: None