This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
Which Drug is contraindicated in prince metal's angina is: 
Select and explain. 
A. Nifedipine, B. Amyl nitrate, C. Propranolol, D. Calcium channel blocker
C: Propranolol
Answer: C: Propranolol 
Explanation: Ans: c