<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 1-week-old male newborn is brought to the physician for a follow-up examination after the results of newborn screening showed an increased serum concentration of phenylalanine. Genetic analysis confirms a diagnosis of phenylketonuria. The physician counsels the patients family on the recommended dietary restrictions, including avoidance of artificial sweeteners that contain aspartame. Aspartame is a molecule composed of aspartate and phenylalanine and its digestion can lead to hyperphenylalaninemia in patients with phenylketonuria. Which of the following enzymes is primarily responsible for the breakdown of aspartame?? A: Pepsin, B: Dipeptidase, C: Chymotrypsin, D: Trypsin, E: Carboxypeptidase A,  <response>: This is a question about phenylketonuria PKU, which is caused by a deficiency in the enzyme phenylalanine hydroxylase. This enzyme breaks down the amino acid phenylalanine. In PKU, phenylalanine builds up and can cause intellectual disability if not treated. The question asks which enzyme breaks down aspartame, an artificial sweetener made up of phenylalanine and aspartate. Pepsin, chymotrypsin, trypsin and carboxypeptidase A are digestive enzymes that break down proteins, but not aspartame specifically. Dipeptidase breaks down dipeptides like aspartame into individual amino acids.B: Dipeptidase 