question: A 19-year-old girl has 1 week history of fever, anorexia and a sore throat. Her  cervical, axillary and inguinal lymph nodes are palpable. Palatal petechiae are seen with inflamed  tonsils. Lab investigation shows lymphocytosis and presence of atypical lymphocytes. Diagnosis?
opa: Toxoplasmosis
opb: Cytomegalovirus infection
opc: Infectious mononucleosis
opd: Streptococcal sore throat