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: Physiology
[{'content': 'Half life of insulin is: \nSelect and explain. \nA. 1\xad-2 min, B. 4-\xad6 min, C. 0\xad-12 min, D. 12\xad-16 min', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The half-\xadlife of insulin in the circulation in humans is about 5 min.The\xa0half\xad-life\xa0of\xa0the\xa0insulin\xa0receptor is about 7 hours.', 'role': 'assistant'}]