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: Surgery
[{'content': 'Ulcers in diabetes are precipitated by all EXCEPT: September 2012 \nSelect and explain. \nA. Microangiopathic changes in blood vessels, B. Neuropathy, C. Trophic ulcers, D. Macroangiopathy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A i.e. Microangiopathic changes in blood vessels', 'role': 'assistant'}]