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': 'History of excessive thirst, hunger, micturition during nights and recent loosening of teeth usually indicate that the patient is suffering from: \nSelect and explain. \nA. Hypertension, B. Hyperthyroidism, C. Diabetes mellitus, D. Glomerulonephritis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]