<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 19-year-old woman presents to the family medical center with a 2-week history of a sore throat. She says that she has felt increasingly tired during the day and has a difficult time staying awake during her classes at the university. She appears well-nourished with a low energy level. Her vital signs include the following: the heart rate is 82min, the respiratory rate is 14min, the temperature is 37.8C 100.0F, and the blood pressure is 11282 mm Hg. Inspection of the pharynx is depicted in the picture. Palpation of the neck reveals posterior cervical lymphadenopathy. The membrane does not bleed upon scraping. What is the most specific finding for detecting the syndrome described in the vignette?? A: Positive monospot test, B: 10 atypical lymphocytes, C: Positive rapid strep test, D: Increased transaminase levels, E: Growth in Lofflers medium,  <response>: Based on the information provided in the question stem, this is a case of infectious mononucleosis caused by the Epstein-Barr virus EBV. The key findings are a 2-week history of sore throat, fatigue, posterior cervical lymphadenopathy, pharyngitis with exudates, and low-grade fever. The most specific test for detecting infectious mononucleosis is a positive monospot test, which detects heterophile antibodies produced in response to EBV infection. Atypical lymphocytes are seen in many viral infections and are not specific for mononucleosis. A rapid strep test would be negative since this is caused by a virus, not streptococcus bacteria. Transaminase levels can be elevated in mononucleosis but are not a specific finding. Growth in Lofflers medium is used to diagnose diphtheria, not mononucleosis.A: Positive monospot test 