This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'Monotherapy with which of the following antidiabetic drug can cause hypoglycemia? \nSelect and explain. \nA. Metformin, B. Gliclazide, C. Piogiltazone, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Gliclazide belongs to sulphonyluread. It has higher incidence of hypoglycemia. metformin and glitazones- no hypoglycemia risk (REF.Essential of medical pharmacology K D TRIPATHI 6 Edition, Page No - 268)', 'role': 'assistant'}]