This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epilepsy, Subject name: Pharmacology
[{'content': 'A-22-year-old female on antiepileptic therapy got married. When should the folic acid supplementation be advised to this female? \nSelect and explain. \nA. 3 months before pregnancy, B. All women who could become pregnant, C. As soon as pregnancy is confirmed, D. After delivery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) All women who could become pregnant(Ref: Nelson 19th/e p2001)"The U.S. Public Health Service has recommended that all women of childbearing age and who are capable of becoming pregnant take 0.4 mg of folic acid daily. If, however, a pregnancy is planned in high-risk women (previously affected child), supplementation should be started with 4 mg (= 4000 microgram) of folic acid daily, beginning 1 month before the time of the planned conception."', 'role': 'assistant'}]