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': 'Osseous loose bodies in the joints are common in all of the following, except - \nSelect and explain. \nA. Osteochondritis dessicans, B. Osteoarthritis, C. Osteochondral fracture, D. Rheumatoid arthritis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Causes of loose bodies include :-\n\n\nOsteoarthritis\xa0\nOsteochondritis dessicans\nOsteochondral fracture (injury)\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\nCharcot's disease\nSynovial chondromatosis\n\n\nAmong these, osteochondral fracture causes single loose bodies, while all other can cause multiple loose bodies, maximum by synovial chondromatosis (up to hundred’s).", 'role': 'assistant'}]