<prompt> Vitamin given in pregnant women to prevent neural tube defect:Folic acidVitamin B12Vitamin CVitamin A  <response>: Ans: a Folic acid Ref: Vasudevan, 4th ed, p. 292; ed, p. 305Folic acid given during pregnancy prevents foetal malformations such as spina bifida.Folic acid:Folic acid consists of pteridine attached to one molecule of PABAand glutamic acid. 