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: Pathology
[{'content': 'Alpha fetoprotein is raised in all except: September2011 \nSelect and explain. \nA. Teratocarcinoma, B. Down syndrome, C. Embryonal cell carcinoma, D. Hepatocellular carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Down syndrome AFP is produced by hepatocellular carcinomas, yolk sac remnants in the gonads, and occasionally teratocarcinomas and embryonal cell carcinomas.', 'role': 'assistant'}]