Which of the following vitamins is categorized as fat-soluble?

Vitamin A is categorized as a fat-soluble vitamin, which distinguishes it from the water-soluble vitamins. Fat-soluble vitamins, including A, D, E, and K, are absorbed along with dietary fat in the intestines and can be stored in the body's fatty tissues and liver. This ability to store means that they do not need to be consumed as frequently as water-soluble vitamins, which are excreted more readily through urine.

In contrast, the other options—Vitamin B, Vitamin C, and Vitamin B12—are all water-soluble vitamins that must be consumed more regularly, as they cannot be effectively stored in the body. Understanding the solubility of vitamins is essential for recognizing how they function in the body, their absorption, and their dietary requirements.