Which of the following is not a fat-soluble vitamin?

The answer is accurate because Vitamin C is classified as a water-soluble vitamin. Unlike fat-soluble vitamins, which include Vitamins A, D, E, and K, water-soluble vitamins dissolve in water and are not stored in large quantities in the body. Instead, they are excreted in urine when consumed in excess. This distinction is crucial in understanding nutrient metabolism and the body's storage capabilities.

Fat-soluble vitamins, on the other hand, require fat for absorption and can accumulate in the body's fat tissues and liver. This ability to store fat-soluble vitamins means that an individual can potentially experience toxicity if consumed in excessive amounts, which is not a risk with water-soluble vitamins since they are typically excreted. Thus, recognizing the difference between fat-soluble and water-soluble vitamins helps in understanding dietary requirements and potential health impacts related to vitamin intake.