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 not an insulin analogue? \nSelect and explain. \nA. Insulin glargine, B. Insulin lispro, C. Actrapid, D. Insulin aspart', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (C) Actrapid(Ref: KDT 8/e p285)Actrapid (regular insulin) and monotard (Lente-insulin) are unmodified insulins with same amino acid squence as natural insulinLispro, aspart, glulisine and glargine are insulin analogues in which slightly different amino acid sequence is present to modify pharmacokinetics.', 'role': 'assistant'}]