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': 'Insulin acts through which receptor? (REPEAT) \nSelect and explain. \nA. GPCR, B. Enzyme-linked, C. Intracellular, D. Ion channel', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Insulin acts through tyrosine phosphate kinase-enzyme.', 'role': 'assistant'}]