The correct answer is option 2, Vitamin C.

Vitamins are essential organic compounds that our bodies need in small amounts for various functions. They can be classified into two groups: water soluble vitamins and fat soluble vitamins.

Water soluble vitamins are those that dissolve in water and are easily absorbed by the body. They are not stored in large amounts and are typically excreted in urine, so they need to be consumed regularly. Vitamin C, also known as ascorbic acid, is a water soluble vitamin. It plays a crucial role in the growth and repair of tissues, the formation of collagen, the absorption of iron, and the proper functioning of the immune system.

On the other hand, fat soluble vitamins, such as Vitamins A, E, and K (options 1, 3, and 4), are absorbed along with dietary fats and are stored in the body`s fatty tissues and liver. They are not excreted as easily and can accumulate to toxic levels if consumed in excess.

In conclusion, while Vitamin C (option 2) is a water soluble vitamin, options 1, 3, and 4 (Vitamin A, E, and K) are fat soluble vitamins.