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: Medicine
[{'content': 'All are used in treatment of Helicobactor pylori, EXCEPT: \nSelect and explain. \nA. Colloid bismuth, B. Cisapride, C. Clarithromycin, D. Metronidazole', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Cisapride) Cispride is not included in any of the successful multidrug regimens against H. pylori infection.', 'role': 'assistant'}]