This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
A 22-year-old female on antiepiletic therapy got married. When should the folic acid supplementation be advised to this female? 
Select and explain. 
A. 3month before pregnancy, B. All women who could become pregnant, C. As soon as pregnancy is confirmed, D. After delivery
B: All women who could become pregnant
Answer: B: All women who could become pregnant 
Explanation: "The U.S.Public Health Service has recommended that all women of childbearing age and who are capable of becoming pregnant take 0.4mg of folic acid daily. If however, a pregnancy is planned in high-risk women(previously affected child), supplementation should be staed with 4mg (=4000 microgram) of folic acid daily, beginning 1 month before the time of the planned conception." Ref NELSON 19TH ED.