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: Dental
[{'content': 'Most common form of psoriatic arthritis \nSelect and explain. \nA. Polyarthritis, B. Asymmetric oilgoarthritis, C. Symmetric oilgoarthritis, D. Asymmetric polyarthritis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Psoriatic arthritis is associated with HLAB27 and asymmetric oilgoarthritis is the most\xa0common form.', 'role': 'assistant'}]