This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'Neural tube defects is prevented by \nSelect and explain. \nA. Folic acid, B. Vitamin B12, C. Vitamin B6, D. Vitamin - C', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Folic acid) (343 - Dutta 6th)Pre pregnancy folic acid therapy (4mg daily) is given when there is any history of neural tube defects in previous birth. Therapy is started 1 month before conception and is continued in the first trimester', 'role': 'assistant'}]