<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A previously healthy 16-year-old girl comes to the physician because of fever, fatigue, and a sore throat for 8 days. She also has a diffuse rash that started yesterday. Three days ago, she took amoxicillin that she had at home. She is sexually active with two male partners and uses condoms inconsistently. Her temperature is 38.4C 101.1F, pulse 99min, blood pressure 10670 mm Hg. Examination shows a morbilliform rash over her trunk and extremities. Oropharyngeal examination shows tonsillar enlargement and erythema with exudates. Tender cervical and inguinal lymphadenopathy are present. Abdominal examination shows mild splenomegaly. A peripheral blood smear shows lymphocytosis with 10 atypical lymphocytes. Which of the following is most likely to be positive in this patient?? A: ELISA for HIV, B: Flow cytometry, C: Anti-CMV IgM, D: Throat swab culture, E: Heterophile antibody test,  <response>: This is a clinical case scenario about a 16-year-old girl presenting with fever, fatigue, sore throat, rash, and lymphadenopathy. She has a history of recent amoxicillin use and inconsistent condom use with multiple sexual partners. On exam she has tonsillar exudates, cervical and inguinal lymphadenopathy, splenomegaly, and atypical lymphocytes on peripheral smear. The key findings are the morbilliform rash, lymphadenopathy, splenomegaly, and atypical lymphocytes, which are classic for infectious mononucleosis caused by Epstein-Barr virus EBV. The presence of exudative pharyngitis also supports this. The heterophile antibody test is most likely to be positive in EBVmononucleosis. The other tests listed may be relevant in the workup but are less specific for diagnosing infectious mononucleosis.E: Heterophile antibody test 