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: Pediatrics
[{'content': 'Not seen in the first decade - \nSelect and explain. \nA. Retino blastoma, B. Rhabdomyosarcoma, C. Neuroblastoma, D. Ameloblastoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ameloblastoma is not a childhood tumor.\nOther three are childhood malignancies.', 'role': 'assistant'}]