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 mother with 10 weeks pregnancy and who had previously delivered a baby with open neural tube defect which statement is true: 
Select and explain. 
A. Sodium valproate causes open neural tube defect, B. Risk of recurrence is 10%, C. Amniocentesis should be done, D. Give multivitamin
A: Sodium valproate causes open neural tube defect
Answer: A: Sodium valproate causes open neural tube defect 
Explanation: None