This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arthritis, Subject name: Orthopaedics
[{'content': 'A 40-year-old female previous case history of fever, fatigue, weight loss polyarthralgia. The radiological findings given below, what may be your diagnosis? \nSelect and explain. \nA. Osteoarthritis, B. Rheumatoid arthritis, C. Gout, D. Psoriatic arthritis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Rheumatoid arthritisThe radiological finding shows swan neck deformity, it is the clue for RA.Boutonniere deformity also seen in RA.Osteoarthritis: Heberden nodes and Bouchard nodes are seen.Psoriatic arthritis: Pencil-in-cup" deformity of DIP on X-ray.For more details see orthopedic last minute revision Table No. 25', 'role': 'assistant'}]