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: Surgery
[{'content': 'Most common sarcoma in a child is \nSelect and explain. \nA. Fibrosarcoma, B. Rhabdomyosarcoma, C. Leiom yo sarcoma, D. Liposarcoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Rhabdomyosarcoma", 'role': 'assistant'}]