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
Best and least toxic treatment for amoebic dysentery is: 
Select and explain. 
A. Emetine, B. Chloroquine, C. Metronidazole, D. Diloxanide furoate
C: Metronidazole
Answer: C: Metronidazole 
Explanation: Ans: cRef: Harrison, 16thed, p. 1215