Banana is a fruit that is rich in various nutrients and minerals. The correct answer is option 'C', which is potassium. Let us understand why potassium is present in banana:

Potassium in Banana:

- Potassium is an essential mineral that helps in regulating fluid balance, muscle contractions, and nerve signals in the body.
- Banana is one of the best sources of dietary potassium. A medium-sized banana contains about 400-450 mg of potassium.
- Potassium is present in the fruit in the form of ions. These ions help in the proper functioning of muscles and nerves.
- Potassium also helps in maintaining healthy blood pressure levels and reducing the risk of heart diseases.

Other Nutrients in Banana:

Apart from potassium, banana also contains other essential nutrients such as:

- Carbohydrates - Banana is a rich source of carbohydrates, mainly in the form of natural sugars such as glucose, fructose, and sucrose.
- Fiber - Banana contains both soluble and insoluble fiber. Fiber helps in maintaining healthy digestion and bowel movements.
- Vitamins - Banana is a good source of vitamins such as vitamin C, vitamin B6, and folate.
- Minerals - Apart from potassium, banana also contains other essential minerals such as magnesium, calcium, and phosphorus.

In conclusion, banana is a nutritious fruit that contains various essential nutrients, including potassium. Potassium helps in regulating fluid balance, muscle contractions, and nerve signals in the body.

D iodine because if we take out the oeal if banana it gets brown this shows the presence of iodine.