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': 'Which of the following is rapidly acting insulin? \nSelect and explain. \nA. Lente, B. Glargine, C. Ultralente, D. Lispro', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. LisproLispro and as part is rapid acting, regular insulin is short acting, Lente is intermediate acting and Ultra Lente, glargine is longer acting.', 'role': 'assistant'}]