Concept:Body-building nutrients.Explanation:Proteins are essential nutrients that act as the building blocks for our body's tissues and organs. They are crucial for growth, repair, and overall bodily functions. Among the given options, pulses like red gram are well-known for being a rich source of protein. Wheat, rice, and maize are primarily sources of carbohydrates. Therefore, red gram is the food that is rich in proteins.Answer:C. Red gram