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: Medicine
[{'content': 'Ulcers in Diabetes precipitated by -a) Trophic ulcersb) Neuropathyc) Microangiopathic changes in blood vesselsd) Macroangiopathy \nSelect and explain. \nA. acd, B. bcd, C. abc, D. abd', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]