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: Microbiology
[{'content': 'Which of the following is false regarding H. pylori - \nSelect and explain. \nA. With chronic infection urease breath test become negative, B. H. pylori infection remains life long if untreated, C. Endoscopy is diagnostic, D. Toxigenic strains usually cause ulcer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]