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
Open Neural tube defect is best diagnosed by: 
Select and explain. 
A. USG, B. Maternal serum alpha fetoprotein, C. X-ray, D. Amniotic fluid acetycholinesterase
D: Amniotic fluid acetycholinesterase
Answer: D: Amniotic fluid acetycholinesterase 
Explanation: Amniotic fluid acetycholinesterase