<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 22-year-old man presents to the emergency department with a fever and a sore throat. He has had these symptoms for the past 2 weeks and has felt progressively more fatigued. His temperature is 102F 38.9C, blood pressure is 12068 mmHg, pulse is 100min, respirations are 17min, and oxygen saturation is 98 on room air. Physical exam is notable for tonsillar exudates, posterior cervical lymphadenopathy, and splenomegaly. Which of the following is the most appropriate next step in management for this patient?? A: Amoxicillin, B: Monospot test, C: No further workup needed, D: Oseltamivir, E: Rapid strep test,  <response>: This is a clinical vignette describing a 22-year-old man with a 2-week history of fever, sore throat, fatigue, tonsillar exudates, lymphadenopathy, and splenomegaly. The key findings are prolonged fever, sore throat, fatigue, tonsillar exudates, lymphadenopathy, and splenomegaly. This presentation is most consistent with infectious mononucleosis caused by Epstein-Barr virus EBV. The next step would be to confirm the diagnosis with a monospot test, which detects heterophile antibodies that are produced in response to EBV infection. Amoxicillin, oseltamivir, rapid strep test, and no further workup are not indicated in this clinical scenario.B: Monospot test 