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': 'Periconceptional use of the following agent teads to reduced incidence ol neural tube defects : \nSelect and explain. \nA. Folic acid, B. Iron, C. Calcium, D. Vitamin A', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Folic acid', 'role': 'assistant'}]