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': 'In diabetes mellitus which is/are not found -a) Encephalopathyb) Myelopathyc) Myopathyd) Retinopathy \nSelect and explain. \nA. acd, B. bcd, C. abc, D. ab', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]