Weight-lifters are generally required to make more muscles and body mass. For this purpose, they need to
take a diet which is rich in

Correct option is D

The correct answer is Proteins.
Many trainers and lifters try to include a protein source with every meal – whether derived from pulses, whole grains, soy, beef, chicken, eggs, dairy or seafood. Any snacks in between meals should also be rich in protein, which helps to repair muscle cells when broken down into amino acids. It makes intuitive sense that protein in our diets should aid in bulking up muscles in our bodies, since muscles consist mostly of protein. When we lift weights, we stress the muscles and cause minute damage to muscle tissue, which then makes new proteins to heal.