What are the four fat-soluble vitamins?

The four fat-soluble vitamins are A, D, E, and K. These vitamins are absorbed along with dietary fats in the intestine and require fat for their proper absorption. Fat-soluble vitamins play crucial roles in various bodily functions; for example, vitamin A is vital for vision and immune function, vitamin D is important for calcium absorption and bone health, vitamin E acts as an antioxidant protecting cells from damage, and vitamin K is essential for blood clotting and bone metabolism.

In contrast, the other options contain vitamins that are either water-soluble or incorrectly grouped. For instance, vitamin C and all B vitamins are considered water-soluble, which means they dissolve in water and are not stored in large amounts in the body, thus requiring regular consumption through the diet.