This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Which of the following drugs promotes the release of endogenous insulin? 
Select and explain. 
A. Acarbose, B. Glipizide, C. Nateglinide, D. Pioglitazone
A: Acarbose
Answer: A: Acarbose 
Explanation: (Ref: KDT 6/e p270) It is an alpha-glucosidase inhibitor. It inhibits the breakdown of complex carbohydrates to simple carbohyrates and thus decreases their absorption.