The correct answer is option 4, which is Fried gram. Fried gram is a legume that is rich in proteins. Legumes, including grams such as chickpeas and lentils, are known for their high protein content. Proteins are essential nutrients that serve as building blocks for our body, supporting the growth and repair of tissues.

Option 1, Boiled rice, is not a significant source of protein. Rice is primarily a source of carbohydrates and does not contain a significant amount of protein.

Option 2, Bread of wheat, may contain some protein, but it is not as protein-dense as legumes like fried gram. Wheat bread is mainly made from flour, which is primarily a source of carbohydrates.

Option 3, Fried potato chips, is not a good source of protein. Potatoes are mainly carbohydrates, and frying them does not add any significant protein content.

In summary, if you are looking for a food rich in proteins, option 4, Fried gram, would be the best choice among the given options.