Which of the following is a water-soluble vitamin?

Vitamin C is classified as a water-soluble vitamin. This means that it dissolves in water and is typically not stored in the body but is rather excreted through urine. Water-soluble vitamins, such as Vitamin C, need to be consumed regularly in the diet to maintain adequate levels, as they play important roles in various bodily functions, including immune function and collagen synthesis.

In contrast, the other options listed are fat-soluble vitamins. Vitamins D, A, and E are stored in the body’s fatty tissues and liver, and they are absorbed along with dietary fat. They have different functions and requirements for absorption and storage compared to water-soluble vitamins. This distinction is crucial for understanding how different vitamins work within the body and the dietary sources that provide them.