<prompt> Marker of neural tube defects is:PAPPAhCGEstriolAcetylcholinesterase  <response>: d. AcetylcholinesteraseRef: Nelsons 20e p 2802-2803, Ghai 8e p 575-577Diagnosis 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. 