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
[{'content': 'The antiulcer agent detaches and kills H. Pylori organism and prevent relapses is \nSelect and explain. \nA. Colloidal Bismuth, B. Pirenzipine, C. Misoprostol, D. Sucralfate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]