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': 'Insulin release due to closure of K+ channels is seen with: \nSelect and explain. \nA. Nateglinde, B. Acarbose, C. Exenatide, D. Sitagliptin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]