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: Orthopaedics
[{'content': 'All are features of Rheumatoid - arthritis, EXCEPT- \nSelect and explain. \nA. Osteosclerosis of joint, B. Soft tissue swelling, C. Narrowing of joint space, D. Periarticular osteoporosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Radiological features of RA\n\nFollowing features are seen on X-ray :-\n\n\nReduced joint space\nErosion of articular margins\nSubchondral cysts\nJuxta-articular rarefaction\nSoft tissue shadow at the level of the joint because of joint effusion or synovial hypertrophy\nDeformities of the hand and fingers\nPeriarticular osteopenia (osteoporosis)', 'role': 'assistant'}]