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
The best marker for neural tube defect is: 
Select and explain. 
A. Acetyl glucosonidase, B. Acetyl cholinesterase, C. Alpha fetoprotein, D. Chorionic gonadotrophin
B: Acetyl cholinesterase
Answer: B: Acetyl cholinesterase 
Explanation: None