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
Low MSAFP is seen in all except : 
Select and explain. 
A. Neural tube defect, B. Trisomy 21, C. Skeletal deformity, D. Cardiac anomaly
A: Neural tube defect
Answer: A: Neural tube defect 
Explanation: Neural tube defect