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': "False about Osler's nodes \nSelect and explain. \nA. Swellings at fingertips, B. Painless, C. Common in staph aureus endocarditis, D. All the above", 'role': 'user'}, {'content': "Answer: B \nExplanation: Osler's nodes are painful swellings.", 'role': 'assistant'}]