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
Codman's triangle is seen in – 
Select and explain. 
A. Chondroblastoma, B. Osteosarcoma, C. Chandrosarcoma, D. GCT
B: Osteosarcoma
Answer: B: Osteosarcoma 
Explanation: None