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': "Fever, clubbing and Osler's nodes occur in: \nSelect and explain. \nA. Typhoid fever, B. Rheumatic fever, C. Infective endocarditis, D. Leptospirosis", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]