1. Which of the following is a function of vitamin D in the body? A. Regulation of blood sugar levels B. Promotion of calcium absorption in the intestines C. Production of red blood cells D. Synthesis of neurotransmitters Answer: B. Promotion of calcium absorption in the intestines Rationale: Vitamin D is essential for calcium absorption in the intestines, which is important for bone health. 2. Which of the following is an example of a fat-soluble vitamin? A. Vitamin C B. Vitamin B12 C. Vitamin A D. Folic acid Answer: C. Vitamin A Rationale: Fat-soluble vitamins are stored in the body's fat tissue, and vitamin A is one example of a fat-soluble vitamin. 3. Which of the following minerals is essential for the synthesis of thyroid hormones? A. Iron B. Zinc C. Iodine D. Magnesi