When studying vitamins, remember that the fat-soluble vitamins are A, D, E, and K, while the water-soluble vitamins include the B-complex group and Vitamin C.
Fat-soluble vitamins are vitamins that dissolve in fats and oils and can be stored in the body's fatty tissues. The four fat-soluble vitamins are Vitamins A, D, E, and K.
- Vitamin B\(_1\) and Vitamin B\(_{12}\) are water-soluble vitamins.
- Vitamin C is also a water-soluble vitamin.
Therefore, among the options provided, the correct answer is Vitamin K, which is a fat-soluble vitamin.
Thus, the correct answer is Vitamin K.