This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Pediatrics
A 6 year child presents with hepatosplenomegaly & generalized lymphadenopathy along with fever. The child developed a rash, after being administered ampicillin. What could be the possible diagnosis? 
Select and explain. 
A. Infectious mononucleosis, B. Scarlet fever, C. Kawasaki disease, D. HIV infection
A: Infectious mononucleosis
Answer: A: Infectious mononucleosis 
Explanation: Infectious mononucleosis: Aka glandular fever Etiological agents: Epstein-Barr virus (EBV) Mode of transmission: Blood transfusion, Direct contact C/F: Fever, headache, sore throat, generalized lymphadenopathy, splenomegaly, hepatomegaly Patients with infectious mononucleosis treated with ampicillin or amoxicillin may experience "Ampicillin rash" which may occur with other b- lactam antibiotics. This morbilliform, vasculitis "ampicillin rash" is probably immune mediated and resolves without specific treatment.