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
[{'content': 'A mother with 10 weeks pregnancy and who had previously delivered a baby with open neural tube defect which statement is true: \nSelect and explain. \nA. Sodium valproate causes open neural tube defect, B. Risk of recurrence is 10%, C. Amniocentesis should be done, D. Give multivitamin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]