Nutritional deficiency of which vitamin may lead to night blindness?

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

Answer: (D)

Night blindness is primarily associated with a deficiency of Vitamin A. This vitamin plays a crucial role in maintaining healthy vision, particularly in low-light conditions. It is a vital component of rhodopsin, a protein in the eyes that allows for the detection of light. When there is an inadequate intake of Vitamin A, the production of rhodopsin is impaired, leading to difficulty seeing in dim light or darkness, which is characterized as night blindness.

While other vitamins are important for overall health and contribute to various bodily functions, they do not specifically impact vision in the same way that Vitamin A does. For instance, Vitamin B and Vitamin C are essential for metabolism and immune function, respectively, while Vitamin D is important for bone health and calcium regulation. However, none of these vitamins are directly linked to the prevention of night blindness. Thus, the relationship between Vitamin A deficiency and night blindness underscores the crucial role this particular vitamin plays in maintaining optimal vision.