This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Four Formulas, Subject name: Biochemistry
[{'content': 'Glycogenolysis is activated in muscles due to: \nSelect and explain. \nA. Glucagon, B. Insulin, C. Epinephrine, D. Growth hormone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Glycogenolysis is activated by glucagon & epinephrine But Glucagon receptors are not found in muscles. So epinephrine increases glycogenolysis in muscles.', 'role': 'assistant'}]