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
Which of the following is not a cause of sudden increase pain in osteochondroma: 
Select and explain. 
A. Bursitis, B. Fracture, C. Sarcomatous changes, D. Degenerative changes
D: Degenerative changes
Answer: D: Degenerative changes 
Explanation: 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.