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
What is risk of neural tube defect in child, if  either parent is born with spina bifida. 
Select and explain. 
A. 3%, B. 5%, C. 10%, D. 15%
B: 5%
Answer: B: 5% 
Explanation: Risk of NTDs in child if either parent is born with
→ NTD is 5%
→ Risk is 10% if couple have 2 affected children.