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': 'Most common presentation of cardiac lupus ? \nSelect and explain. \nA. Myocarditis, B. Pericarditis, C. Aoic regurgitation, D. Libman sacks endocarditis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. PericarditisHea (lupus calditis) - Pericarditis (most common), myocarditis, endocarditis, pericardial effusion, coronary aery disease.', 'role': 'assistant'}]