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
Drug not used in Prinzmetal angina is: 
Select and explain. 
A. Propranolol, B. Verapamil, C. Nitrites, D. Isosorbide dinitrate
A: Propranolol
Answer: A: Propranolol 
Explanation: Propranolol