This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal infections, Subject name: Anatomy
[{'content': 'Age group affected by Osteosarcoma \nSelect and explain. \nA. Up-to 10 yrs, B. 10 -20 yrs, C. 30-40 yrs, D. Older than 45 yrs', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This is predominantly a tumor of childhood or adolescence, occurring most commonly in the 10-25years Refer Maheshwari 6tg/e p 239', 'role': 'assistant'}]