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
Coronary steal phenomenon is caused by which drug ? 
Select and explain. 
A. Disopyramide, B. Verapamil, C. Nitroglycerine, D. Dipyridamol
D: Dipyridamol
Answer: D: Dipyridamol 
Explanation: None