Peanuts are rich in essential nutrients. In a 100 g serving, peanuts provide 570 calories and are an excellent source of several B vitamins, vitamin E, several dietary minerals, such as manganese, magnesium and phosphorus and dietary fiber. They also contain about 52% protein per 100 g serving, a higher proportion than in many tree nuts. 100 g of hard red winter wheat contain 28% of protein. 100g of rice contains only 5% of protein. 100g of gram contains 38% of protein. Thus, option D is correct.