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': 'A labourer involved with repair-work of sewers was admitted with fever, jaundice and renal failure. The most appropriate test to diagnose the infection in this patient is - \nSelect and explain. \nA. Weil Felix test, B. Paul Bunnell test, C. Microscopic agglutination test, D. Microimmunofluorescence test', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]