This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'Best and least toxic treatment for amoebic dysentery is: \nSelect and explain. \nA. Emetine, B. Chloroquine, C. Metronidazole, D. Diloxanide furoate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: cRef: Harrison, 16thed, p. 1215', 'role': 'assistant'}]