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: Pharmacology
[{'content': 'All of the following drugs used in the management of diabetes mellitus cause hypoglycemia except: \nSelect and explain. \nA. Metformin, B. Tolbutamide, C. Glibenclamide, D. Glipizide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]