This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Orthopaedics
[{'content': 'Which of the following is not a cause of sudden increase pain in osteochondroma: \nSelect and explain. \nA. Bursitis, B. Fracture, C. Sarcomatous changes, D. Degenerative changes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Degenerative changesDegenerative changes will lead to slowly increase in size of osteochondroma whereas other listed causes will result in sudden increase in the size of osteochondroma.', 'role': 'assistant'}]