This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': "Frie's test is useful for diagnosis of - \nSelect and explain. \nA. Mycoplasma, B. Rickettsia, C. Sarcoidosis, D. Chlamydia", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Chlamydiao Fries test (skin hypersensitivity test) was used for LGV (caused by chlamydia trachomatis),o But it is not used nowr because of high false positive results.", 'role': 'assistant'}]