This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Which of the following is least likely to cause constrictive pericarditis? \nSelect and explain. \nA. Tuberculous pericardial effusion, B. Staphylococcal effusion, C. Post cardiac surgery, D. Acute rheumatic fever', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref Harrison 19 th ed pg 1575 When pericarditis occurs in the absence of any obvious underlying disorder, the diagnosis of SLE may be suggested by a rise in the titer of antinuclear antibodies. Acute pericarditis is an occasional complication of rheumatoid ahritis, scleroderma, and polyaeritis nodosa, and other evidence of these diseases is usually obvious.', 'role': 'assistant'}]