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': 'Life-threatening complications of diabetes mellitus are all except - \nSelect and explain. \nA. Malignant otitis externa, B. Rhinocerebral mucormycosis, C. Emphysematous pyelonephritis, D. Emphysematous appendicitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]