This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Following are spontaneous resolution tumours except - 
Select and explain. 
A. Malignant melanoma, B. Osteogenic sarcoma, C. Cholangio carcinoma, D. Retinoblastoma
B: Osteogenic sarcoma
Answer: B: Osteogenic sarcoma 
Explanation: A cancer that stas in the bone. In the ends of bone where new bone forms as the person grows. Thigh, upper arm, shin are the common sites.