Fat soluble vitamins are a group of vitamins that are soluble in fat and are stored in the body's fatty tissues. These vitamins require fat for absorption and are stored in the liver and adipose tissue for future use. One of the fat soluble vitamins is Vitamin A.

Vitamin A:
- Vitamin A is a fat soluble vitamin that plays a crucial role in maintaining healthy vision, immune function, and cell growth.
- It is found in two forms: retinol (found in animal sources) and carotenoids (found in plant sources).
- The body converts carotenoids into retinol, which is the active form of Vitamin A.
- Foods rich in Vitamin A include liver, fish oil, dairy products, eggs, and fruits and vegetables such as carrots, spinach, and sweet potatoes.
- Deficiency of Vitamin A can lead to night blindness, dry skin, impaired immune function, and growth retardation in children.

Vitamin B:
- Vitamin B is a group of water soluble vitamins that play various roles in energy production, metabolism, and the functioning of the nervous system.
- There are several different types of Vitamin B, including B1 (thiamine), B2 (riboflavin), B3 (niacin), B6 (pyridoxine), and B12 (cobalamin), among others.
- Foods rich in Vitamin B include whole grains, meat, eggs, dairy products, and leafy green vegetables.
- Deficiency of specific B vitamins can lead to conditions such as beriberi (B1 deficiency), pellagra (B3 deficiency), and anemia (B12 deficiency).

Vitamin C:
- Vitamin C, also known as ascorbic acid, is a water soluble vitamin that is known for its antioxidant properties and its role in collagen synthesis.
- It plays a crucial role in immune function, wound healing, and the absorption of iron.
- Foods rich in Vitamin C include citrus fruits, berries, kiwi, peppers, and leafy green vegetables.
- Deficiency of Vitamin C can lead to scurvy, a condition characterized by fatigue, bleeding gums, and poor wound healing.

Vitamin D:
- Vitamin D is a unique vitamin that can be synthesized by the body when the skin is exposed to sunlight.
- It plays a crucial role in calcium absorption and bone health.
- Foods rich in Vitamin D include fatty fish, fortified dairy products, and egg yolks.
- Deficiency of Vitamin D can lead to conditions such as rickets in children and osteomalacia in adults.

In conclusion, out of the given options, Vitamin A is known as a fat soluble vitamin. It is important to consume a balanced diet that includes a variety of foods to ensure an adequate intake of all essential vitamins and minerals.