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
Flushing is common in patient taking which of the following oral hypoglycemic drug with alcohol: 
Select and explain. 
A. Chlorpropamide, B. Phenformin, C. Glibenclamide, D. Tolazamide
A: Chlorpropamide
Answer: A: Chlorpropamide 
Explanation: None