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': 'Method of choice to confirm H. Pylori eradication is \nSelect and explain. \nA. Urea breath test, B. Culture, C. Serology, D. Microscopy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]