This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'An 18-year-old woman presents to the clinic complaining of malaise for the past 3 weeks, fever for 2 weeks, and a sore throat. Physical examination shows pharyngeal infection with enlarged tonsils and a patchy, white exudate; enlarged, palpable anterior and posterior cervical, axillary, and inguinal lymph nodes; tenderness in the right upper quadrant; and minimal splenomegaly. Laboratory data show hemoglobin 14 g/dL; hematocrit 42%; platelets 380,000/mL; WBC 8500/mL, with 35% segmented neutrophils, 1% eosinophils, and 64% lymphocytes, of which 36% were atypical. Which of the following is the most likely diagnosis? \nSelect and explain. \nA. infectious hepatitis, B. lymphocytic leukemia, C. infectious mononucleosis, D. Hodgkin disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Infectious mononucleosis is an acute, self-limited infection of the lymphatic system by the EBV Typical infectious mononucleosis has an incubation period of 4-8 weeks. The prodrome includes malaise, anorexia, and chills, and then the classic symptoms of pharyngitis, fever, and lymphadenopathy develop. Headache is also common.', 'role': 'assistant'}]