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
[{'content': 'Long acting insulin is ? \nSelect and explain. \nA. Insulin glargine, B. Insulin lispro, C. Insulin aspart, D. Insulin glulisine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]