This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'A patient with H. pylori infection is treated with drugs. The best method to detect presence of residual H. pylori infection in this person is - \nSelect and explain. \nA. Rapid urease test, B. Urea breath test, C. Endoscopy and biopsy, D. Serum anti H. pylori titre', 'role': 'user'}, {'content': "Answer: B \nExplanation: <p>Davidson's principles and practice of medicine 22nd edition. *urea breath test is highly specific and sensitive.in detection of h pylori infection</p>", 'role': 'assistant'}]