This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins, Subject name: Biochemistry
[{'content': 'In pregnancy, neural tube defect arises in the fetus due to deficiency of which of the following in the mother? \nSelect and explain. \nA. Vitamin, B. Folic Acid, C. Vitamin A, D. Vitamin C', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Folic AcidRef: Harpers Biochemistry 30th edn. /299, 559-560, 26th edn./494', 'role': 'assistant'}]