Of the following vitamins, which one is fat-soluble?

A fat-soluble vitamin is vitamin A. Vitamins B1, B6, and C are water-soluble vitamins.
Fat-soluble vitamins are a group of vitamins that are soluble in dietary fats and oils. They include vitamin A, vitamin D, vitamin E, and vitamin K.
Fat-soluble vitamins are stored in the body's fat cells and can be released into the bloodstream as needed. This is why it is important to consume a variety of healthy fats in your diet, such as those found in olive oil, avocados, and nuts. Vitamin A is essential for many important functions in the body, including vision, immune function, and cell growth and development. It is also important for maintaining healthy skin and hair.