This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
[{'content': 'Characteristic cardiac lesion in SLE is: \nSelect and explain. \nA. Pericarditis, B. Verrucous endocarditis, C. Myocardial fibrosis, D. Valvular incompetence', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Verrucous endocarditisThe characteristic cardiac lesions of SLE are verrucous valvular abnormalities known as Libman-Sacks endocarditis.They most often are located on the left-sided cardiac valves, particularly on the ventricular surface of the posterior mitral leaflet and are made up almost entirely of fibrin.However, Pericarditis is the most common cardiac manifestation of SLE.', 'role': 'assistant'}]