This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
[{'content': 'The most common symptom of AIDS in an infant is \nSelect and explain. \nA. Gastrointestinal infection, B. Persistent cough, C. Failure to thrive, D. Lymphadenopathy', 'role': 'user'}, {'content': "Answer: A \nExplanation: Clinical features in an HIV infected infant is:Recurrent GI infection and oral thrush is commonly foundClinical features in older children:Growth failureFeverDiarrheaSecondary infection(Refer: OP Ghai's Textbook of Pediatrics, 8th edition, pg no. 202)", 'role': 'assistant'}]