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': "Folic acid supplementation reduces the risk of : \nSelect and explain. \nA. Neural tube defect, B. Toxaemia of pregnancy, C. Down's syndrome, D. Placenta pre", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Neural tube defect', 'role': 'assistant'}]