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: Medicine
[{'content': "For diagnosis of Acute Rheumatic fever, essential is: \nSelect and explain. \nA. Prior h/o rheumatic fever, B. Recent sore throat infection, C. 1 major and 2 minor criteria's, D. Erythema marginatum", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]