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
Long acting insulin is ? 
Select and explain. 
A. Insulin glargine, B. Insulin lispro, C. Insulin aspart, D. Insulin glulisine
A: Insulin glargine
Answer: A: Insulin glargine 
Explanation: None