Aknowledgeable nutritionist would tell a pregnant mother that in order to reduce the risk of having a baby born with spina bifida, mom needs to make sure that she is ingesting an adequate amount

Folic acid.

Explanation:

The lady should take the proper balanced diet at the time of pregnancy with proper and adequate amount of nutrition. The diet must include the carbohydrates, proteins, all vitamins and minerals essential for the mother.

The deficiency of the nutrient can cause abnormal development of the infants. The main function of the folic acid is the proper development of brain and reduce the risk of the development of spina bifida. The deficiency of folic acid must be cured properly.

Thus, the correct answer is folic acid.

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