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': 'Vasanti, 28-year-old, presents with complaints of tightness of fingers. There is also history of dysphagia. Which of the following is the probable diagnosis - \nSelect and explain. \nA. Dermatomyositis, B. Scleroderma, C. Rheumatoid arthritis, D. Polyarteritis nodosa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]