<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 60-year-old man who recently immigrated from South America schedules an appointment with a physician to complete his pre-employment health clearance form. According to company policy, a skin test for tuberculosis must be administered to all new employees. Thus, he received an intradermal injection of purified protein derivative PPD on his left forearm. After 48 hours, a 14-mm oval induration is noticed. The type of cells most likely present and responsible for the indurated area will have which of the following characteristic features?? A: They play an important part in allergic reactions., B: They have multiple-lobed nucleus., C: Their half-life is 2448 hours., D: They need thymus for their maturation., E: They are rich in myeloperoxidase enzyme.,  <response>: This is a medical question asking about the characteristic features of the cells responsible for the indurated area seen in a PPD skin test for tuberculosis. The PPD skin test causes a delayed type hypersensitivity reaction mediated by T lymphocytes if a person has previous exposure to tuberculosis antigens. Therefore, the cells responsible for the induration would be T lymphocytes.D: They need thymus for their maturation. 