This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pediatrics
[{'content': 'Marker of neural tube defects is: \nSelect and explain. \nA. PAPPA, B. hCG, C. Estriol, D. Acetylcholinesterase', 'role': 'user'}, {'content': "Answer: D \nExplanation: d. Acetylcholinesterase(Ref: Nelson's 20/e p 2802-2803, Ghai 8/e p 575-577)Diagnosis Tools for prenatal diagnosis of Neural tube Defects include detailed ultrasound examinations and measurements of maternal serum -fetoprotein MSAFP, amniotic fluid a-fetoprotein, and amniotic fluid acetylcholinesterase (AChE).", 'role': 'assistant'}]