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: Pharmacology
Which of the following is not an insulin analogue ? 
Select and explain. 
A. Insulin glargine, B. Insulin lispro, C. Actrapid, D. Insulin aspart
C: Actrapid
Answer: C: Actrapid 
Explanation: None