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': "Telescope fingers occur in - \nSelect and explain. \nA. Rheumatic arthritis, B. Rheumatoid arthritis, C. Psoriatic arthritis, D. Reiter's arthritis", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]