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: Anatomy
7 years old child presents with a lesion in upper tibia. X ray shows radioluscent area with Codmans triangle and Sunray appearance. Diagnosis is 
Select and explain. 
A. Ewing sarcoma, B. Osteosarcoma, C. Osteoid Osteoma, D. Chondrosarcoma
B: Osteosarcoma
Answer: B: Osteosarcoma 
Explanation: Sunray (sunburst) appearance and Codmans triangle ***typical freatures of Osteosarcoma ***may also be seen in Ewings sarcoma, osteomyelitis onion peel apperacne ***typical feature of Ewings sarcoma ***May also be seen in Osteosarcoma, and osteomyelitis Refer Maheshwari 9th/e p 240.