Folic acid required in first trimester of pregnancy in a women with a history of NTD is :

Ans. is 'c' i.e., 4 mg * More than half of NTDs could be prevented with daily intake of 400 pgm of folic acid throughout the periconceptional period.* A woman with a prior pregnancy complicated by a neural tube defect can reduce the 23% recurrence risk by more than 70% if she takes 4 mg (4000 fig) of folic acid for the month before conception and for the first trimester of pregnancy.