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: Gynaecology & Obstetrics
Maternal serum Alpha Feto Protein (MSAFP) is raised in ail the following conditions except : 
Select and explain. 
A. Spina bifida, B. Multiple pregnancy, C. Omphalocele, D. Down's syndrome
D: Down's syndrome
Answer: D: Down's syndrome 
Explanation: Down's syndrome