Which is not a fat-soluble vitamin? Group of answer choicesVitamin CVitamin EVitamin KVitamin AAll of the compounds above are fat-soluble vitamins.

To determine which option is not a fat-soluble vitamin, let's analyze the vitamins mentioned:

1. Vitamin C: This vitamin is known as ascorbic acid and is water-soluble, meaning it dissolves in water and is not stored in the body in significant amounts.

2. Vitamin E: This is a fat-soluble vitamin that plays a role in protecting cell membranes and has antioxidant properties.

3. Vitamin K: This is also a fat-soluble vitamin, essential for blood clotting and bone metabolism.

4. Vitamin A: This fat-soluble vitamin is important for vision, immune function, and skin health.

5. All of the compounds above are fat-soluble vitamins: This statement cannot be true since we already established that Vitamin C is water-soluble.

Final Answer

The vitamin that is not fat-soluble is Vitamin C.