<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 37-year-old woman presents to the occupational health clinic for a new employee health screening. She has limited medical records prior to her immigration to the United States several years ago. She denies any current illness or significant medical history. Purified protein derivative PPD is injected on the inside of her left forearm for tuberculosis TB screening. Approximately 36 hours later, the patient comes back to the occupational health clinic and has an indurated lesion with bordering erythema measuring 15 mm in diameter at the site of PPD injection. Of the following options, which is the mechanism of her reaction?? A: Type Ianaphylactic hypersensitivity reaction, B: Type IIcytotoxic hypersensitivity reaction, C: Type IIIimmune complex-mediated hypersensitivity reaction, D: Type IVcell-mediated delayed hypersensitivity reaction, E: Type III and IVmixed immune complex and cell-mediated hypersensitivity reactions,  <response>: This is a question about hypersensitivity reactions. The patient developed a delayed hypersensitivity reaction to purified protein derivative PPD that was injected for tuberculosis screening. The reaction occurred approximately 36 hours after injection and consisted of an indurated lesion with bordering erythema at the injection site. This timing and morphology is consistent with a type IV delayed hypersensitivity reaction that is mediated by T cells.Type I reactions are immediate IgE-mediated allergic reactions. Type II reactions involve antibodies against cell surface antigens. Type III reactions are immune complex-mediated. Only type IV reactions are delayed cell-mediated reactions that peak at 48-72 hours.D: Type IVcell-mediated delayed hypersensitivity reaction 