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': "All of the following are true about Raynaud's disease, except: \nSelect and explain. \nA. More, common in females, B. Positive Antinuclear Antibodies, C. Most common cause of Raynaud's phenomenon, D. Has good prognosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Raynaud's disease is not associated with anti nuclear antibodies (ANA's). ANA's are seen in sjogren's syndrome, rheumatoid ahritis, autoimmune hepatitis, scleroderma, polymyositis & dermatomyositis. Ref: CMDT 2006 Edition, Page 464-465; Harrison's Principles of Internal Medicine, 16th Edition, Page 1489.", 'role': 'assistant'}]