<prompt> An 8 year old boy presented with fever and bilateral cervical lymphadenopathy with prior history of sore throat. There was no hepatomegaly. The peripheral blood smear shows 20 lympho plasmacytoid cells. The most likely diagnosis is:TuberculosisInfectious MononucleosisAcute lymphoblastic leukemiaInfluenza  <response>: Ans. B. Infectious MononucleosisThe given clinical situation suggests Infectious MononucleosisFeatures of Infectious Mononucleosis: Cervical Lymphadenopathy Fever History of sore throat 20 atypical lymphocytesHepatomegaly may be absent Occurs only in 30 of cases 