This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic Bone Disease, Subject name: Orthopaedics
[{'content': 'Following X-ray foot is showing features of which disease- \nSelect and explain. \nA. Gout, B. Rheumatoid arthriris, C. Osteoarthritis, D. Psoriatic arthristis', 'role': 'user'}, {'content': "Answer: A \nExplanation: .Ans. is 'a' i.e., Gout* Given X-ray image is showing juxtra-articular erosive changes around the first metatarsophalangeal joint with overhanging edges and moderate soft tissue swelling.* Note the tophus, classical finding of gout.", 'role': 'assistant'}]