Yolanda is trying to get pregnant. her midwife advises her to take supplements of a particular vitamin to protect against neural tube defects in the embryo. which vitamin has this protective effect?

Folate is the vitamin has this protective effect. 

The prescribed everyday admission of folate is 400 micrograms from nourishments or dietary supplements.Folic corrosive is the type of folate used to treat iron deficiency caused by folic corrosive lack. 
There are no basic reactions. It is not known whether high dosages over a drawn out stretch of time are of concern. There are worries that a lot of folic corrosive may shroud vitamin B12 insufficiency. Folic corrosive is basic for the body to make DNA, RNA, and utilize amino acids which are required for cell division. As people can't make folic corrosive, it is required from the eating regimen, making it a basic vitamin.

The answer is c) urethra