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': "Which of the following condition is associated with the presence of Osler's nodes? \nSelect and explain. \nA. Acute staphylococcal endocarditis, B. Chronic candidal endocarditis, C. Pseudomonas endocarditis, D. Libman sack's endocarditis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Septic embolization due to acute staphylococcus aureus endocarditis causes subungual hemorrhage and Osler's nodes. Oslers nodes are painful indurated nodules 2-15 mm in diameter, it is seen on the palms and soles and often involve the distal phalanges. They are usually multiple and tend to occur in crops and fade over 2-3 days. Ref: Hurst's The Hea, 13th Edition By Valentin Fuster, Chapter 18 ; CURRENT Diagnosis and Treatment: Cardiology, 3rd Edition, Chapter 12 ; Harrisons Internal Medicine, 18th Edition, Chapter 124", 'role': 'assistant'}]