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': "A Carey Coomb's murmur heard in a child with mutiple joint pains is suggestive of - \nSelect and explain. \nA. Infective endocarditis, B. Rheumatoid arthritis, C. Rheumatic fever, D. Libman-Sack's endocarditis", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]