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': 'Osteoarthritis is associated with all of the following except - \nSelect and explain. \nA. Decreased joint space, B. Subchondral sclerosis, C. Osteophyte formation, D. Ca++deposition in joint space', 'role': 'user'}, {'content': "Answer: D \nExplanation: Radiological features of osteoarthritis \n\nThe diagnosis of OA can be made on x-ray which shows:-\n\ni) Narrowing of joint space → Earliest manifestation\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\nii) Spurring' or 'lipping' of the joint from the formation of osteophytes\xa0\xa0\niii) Loose bodies\niv) Subchondral sclerosis\nv) Subchondral cyst\nvi) Deformity of the joint", 'role': 'assistant'}]