This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Gastrointestinal System Including Diarrhea, Subject name: Pediatrics
[{'content': 'Profuse watery diarrhea in an immuno-compromised child is due to: \nSelect and explain. \nA. Cryptosporidium, B. Amoeba, C. Giardia, D. Lactose intolerance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cryptosporidium induces severe and protracted diarrhea in AIDS patients.', 'role': 'assistant'}]