<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 26-year-old man comes to the physician for a follow-up examination. He was diagnosed with HIV infection 2 weeks ago. His CD4 T-lymphocyte count is 162mm3 N 500. An interferon-gamma release assay is negative. Prophylactic treatment against which of the following pathogens is most appropriate at this time?? A: Aspergillus fumigatus, B: Mycobacterium tuberculosis, C: Pneumocystis jirovecii, D: Toxoplasma gondii, E: Cytomegalovirus,  <response>: This is a question about choosing appropriate prophylactic treatment for a patient with HIV infection and low CD4 count. The key facts are:- 26-year-old man - Diagnosed with HIV infection 2 weeks ago- CD4 count 162mm3 which is low normal is 500- Negative interferon-gamma release assay, which indicates no latent TB infectionGiven the low CD4 count, he is at risk for opportunistic infections. The most likely pathogen at this CD4 count is Pneumocystis jirovecii, which causes PCP pneumonia. PCP prophylaxis is recommended for HIV patients with CD4 counts 200. The other answer choices are less likely in this clinical scenario.C: Pneumocystis jirovecii 