This vitamin should not be taken in supplements or consumed in large quantities in the diet during pregnancy.

• A. Vitamin A
• B. Vitamin C
• C. Vitamin D
• D. Vitamin B12

Answer: (A)

Excess preformed vitamin A (retinol and retinyl esters) during pregnancy can be teratogenic, causing birth defects and fetal harm, especially in the first trimester. Vitamin A is fat‑soluble and stored in the body, so high intake from supplements or very liver‑rich foods can build up. Because of this risk, high-dose vitamin A supplements are avoided in pregnancy and dietary intake of retinol is limited. Other vitamins listed, like vitamin C, vitamin D, and vitamin B12, do not carry the same teratogenic risk at normal dietary levels, making vitamin A the one to be cautious about in high amounts during pregnancy.