This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Inhibition of glycogenolysis and gluconeogenesis is caused by \nSelect and explain. \nA. Insulin, B. Glucogon, C. Glucocoicoid, D. Epinephrine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Insulin, a key inhibitor of hepatic glucose production, has effects on both glycogenolysis and gluconeogenesisRef: DM Vasudevan, 7th edition', 'role': 'assistant'}]