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
AFP is increased in maternal serum in all except: 
Select and explain. 
A. Open neural tube defects, B. Meningomyelocole, C. Spinabifida, D. Trisomy
D: Trisomy
Answer: D: Trisomy 
Explanation: Trisomy