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: Pharmacology
[{'content': 'Drug of choice for Chagas disease: \nSelect and explain. \nA. Metronidazole, B. Nitazoxanide, C. Pentamidine, D. Benzimidazole', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Chagas disease or American trypanosomiasis is treated using benzimidazole and Nifurtimox is used as alternative.', 'role': 'assistant'}]