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: Surgery
[{'content': 'A 2-year old girl presents the recurrent episodes of diarrhea (mucus and blood at times), hepatosplenomegaly, perianal excoriation and resistant oral thrush. She weighs 6 kg and measures 78 cm in height. The most likely diagnosis is: \nSelect and explain. \nA. Necrotizing enterocolitis, B. Lactose intolerance, C. HIV infection, D. Campylobacter jejuni infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The child is most probably suffering from HIV infection. The clinical picture described in this question like recurrent diarrhoea, resistant oral thrush, gross underweight with hepatosplenomegaly are seen in HIV infection (AIDS). This clinical picture is absent in rest of the three conditions.', 'role': 'assistant'}]