This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatrics, environment and nutrition, Subject name: Pathology
[{'content': 'Not seen in children is \nSelect and explain. \nA. Neuroblastoma, B. Retinoblastoma, C. Hepatoblastoma, D. Seminoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Seminoma, the most common GCT in adults, does not occur before 5 years of age. seminoma is considered a postpubeal tumor.', 'role': 'assistant'}]