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': "Most sensitive test for diagnosing chlamydia: \nSelect and explain. \nA. Gram's staining, B. Nucleic acid amplification testing, C. Elis A, D. Fluoresant microscopy", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Nucleic acid amplification testing', 'role': 'assistant'}]