Adietician examines the diet of a patient who is complaining that he is unable to build muscle mass. the patient eats mainly fresh fruits, vegetables, pasta, bread, and some fats and oils.  which type of supplement will the dietician  most likely  recommend? citric acidfatty acidsnucleic acidsamino acidsmark this and returnsave and exit  next   

Amino acids.

Explanation:

Amino acids are known as building blocks of protein molecules, which make muscle mass. There are total 20 amino acids, which are required for protein synthesis.

Out of these 20 amino acids, only 11 amino acids are synthesized by our body and other 9 amino acids has to get from food sources. These 9 amino acids are called as essential amino acids.

Thus, if a person is complaining that his body cannot build muscle mass, he needs amino acids supplement that can help to build muscle mass as they are building blocks of proteins.

Thus, the correct answer is option). amino acid.