This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'A 17 years old female presents with sore throat, lymphadenopathy and positive heterophile antibodies test. Diagnosis is ? \nSelect and explain. \nA. Tuberculosis, B. Streptococcal pharyngitis, C. Infectious mononucleosis, D. Cytomegalic inclusion disease', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Infectious mononucleosis Laboratory diagnosis In IMN, there is predominantly lymphocytosis with presence of 20% or more atypical lymphocytes. These atypical lymphocytes are activated T-lymphocytes which have round or irregularly shaped nuclei, with abundant flowing cytoplasm that characteristically has a dark-staining peripheri.", 'role': 'assistant'}]