This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Which of the following drug is aipha-glucosidase inhibitor? 
Select and explain. 
A. Pioglitazone, B. Miglitol, C. Met-formin, D. Nateglinide
B: Miglitol
Answer: B: Miglitol 
Explanation: Acarbose , voglibose, miglitilol are alpha glucosidase inhibitors nateglinide- glinides, pioglitazone- thiazolidinediones (REF.Essential of medical pharmacology K D TRIPATHI 6 Edition, Page No - 270)