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 of the following are used for treatment of H.Pylori, except: \nSelect and explain. \nA. Gentamycin, B. Clarithromycin, C. Metronidazole, D. Amoxicillin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Gentamycin): Gentamycin is not used in any of the successful multi-drug regimens against H. Pylori Infection.', 'role': 'assistant'}]