Folate deficit is linked to birth defects. Which of the following is the correct pairing?

• A. Vitamin B12 deficiency
• B. Calcium deficiency
• C. Iron deficiency
• D. Folate deficit

Answer: (D)

Folate is essential for early fetal development, and not getting enough folate during pregnancy is linked to birth defects, especially neural tube defects. The question asks for a pairing that fits the statement “Folate deficit is linked to birth defects.” The answer that best matches this idea is a deficit in the nutrient that directly relates to that link—folate deficit. In other words, the statement points to a deficiency in folate itself as the factor associated with birth defects.

The other options describe deficiencies in different nutrients, which are important for health but do not reflect the specific pairing described in the prompt. While vitamin B12 interacts with folate metabolism, the direct pairing implied here is the deficit in folate itself.