Which vitamins are classified as water-soluble?

Water-soluble vitamins are characterized by their ability to dissolve in water and their efficient processing by the body. The group of vitamins classified as water-soluble includes vitamin C and the B vitamins, such as B1 (thiamine), B2 (riboflavin), B3 (niacin), B6 (pyridoxine), B12 (cobalamin), biotin, and folate. These vitamins play crucial roles in various bodily functions, including energy metabolism, the formation of red blood cells, and the maintenance of neurological health.

Unlike fat-soluble vitamins such as A, D, E, and K, which are stored in the body's fatty tissues and liver, water-soluble vitamins are not stored in the body. Rather, excess amounts are expelled through urine, highlighting the need for regular dietary intake. This makes water-soluble vitamins particularly important for maintaining overall health as they are involved in processes that require constant replenishment.

The other choices provided include vitamins that are classified as fat-soluble or are not recognized as vitamins at all, which distinguishes option B as the only correct answer that identifies true water-soluble vitamins.