This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Following drugs are known to produce osteonecrosis EXCEPT \nSelect and explain. \nA. Glucocoicoids, B. Alcohol, C. Cytotoxicoids, D. NSAIDs', 'role': 'user'}, {'content': "Answer: D \nExplanation: these NSAID's cause gastric irritation and may risk the gastric bleeding. NSAIDs are non-specific cyclo-oxygenase inhibitors. So gastric protection and platelet function are lost.NSAIDS can also precipitate attacks of bleeding ulcers. ref:SRB&;s manual of surgery,ed 3,pg no 299", 'role': 'assistant'}]