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
In the treatment of intestinal and extraintestinal amoebiasis which of the following drug is useful: 
Select and explain. 
A. Diloxane, B. Metronidazole, C. Chloroquine, D. Cefaclor
B: Metronidazole
Answer: B: Metronidazole 
Explanation: None