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: Microbiology
[{'content': 'Doc for Cryptosporidium parvum is \nSelect and explain. \nA. Nitazoxanide, B. Cotrimoxazole, C. Ivermectin, D. DEC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nitazoxanide is Doc for Cryptosporidium.\nCotrimoxazole is Doc for Cyclospora and isospora.', 'role': 'assistant'}]