Which of the following human vitamins is fat-soluble and plays a crucial role in maintaining normal vision, cellular differentiation, and immune function?

💡 Solution & Explanation

Vitamin A is a fat-soluble retinoid essential for low-light vision and cellular health, whereas vitamins C and the B-complex group are water-soluble nutrients that must be replenished frequently in the diet. Deficiency of vitamin A leads to night blindness and xerophthalmia. Beta-carotene found in orange and green vegetables acts as a provitamin that the human body can convert into active vitamin A.