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
Alpha fetoprotein is raised in all except:September2011 
Select and explain. 
A. Teratocarcinoma, B. Down syndrome, C. Embryonal cell carcinoma, D. Hepatocellular carcinoma
B: Down syndrome
Answer: B: Down syndrome 
Explanation: Ans. B: Down syndromeAFP is produced by hepatocellular carcinomas, yolk sac remnants in the gonads, and occasionally teratocarcinomas and embryonal cell carcinomas.