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': 'ASO (Antistreptolysin 0) test is used for the diagnosis of \nSelect and explain. \nA. Rheumatoid arthritis, B. Typhoid fever, C. Rheumatie fever, D. Rickettsial fever', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]