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': 'Antinuclear-antibodies are present in what percentage of cases of SLE ? \nSelect and explain. \nA. 50%, B. 70%, C. 80%, D. More than 90%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]