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: Pathology
[{'content': 'A 50-year-old obese man complains of several recent\nabscesses in the gingiva with loosening of teeth. He\nalso suffers from itching of skin and polyuria. The most\nprobable etiology is: \nSelect and explain. \nA. Scurvy, B. Myxoedema, C. Diabetes mellitus, D. Vitamin A deficiency', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]