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
A couple consulted you for counselling regarding conception. The couple had child born with anencephaly. What is recurrence risk for an open neural - tube in next pregnancy 
Select and explain. 
A. 10%, B. 3 % to 5 %, C. 25%, D. None
B: 3 % to 5 %
Answer: B: 3 % to 5 % 
Explanation: The recurrence risk is 3 → 5 % approximately if a couple has had previously a child with either anencephaly or spina bifida.