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: Radiology
Dense calcification is seen in 
Select and explain. 
A. Chondroblatoma, B. Chondrosarcoma, C. Osteosarcoma, D. Fibrosarcoma
B: Chondrosarcoma
Answer: B: Chondrosarcoma 
Explanation: B i.e. Chondrosarcoma - Most common bone tumor = Osteochondroma Bone tumor with Dense calcification = Chondro Sarcoma Bone tumor with Calcified secondaries = Osteosarcoma