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': 'RPR is done for diagnosis of: \nSelect and explain. \nA. Malaria, B. Syphilis, C. Leishmaniasis, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e., Syphilis", 'role': 'assistant'}]