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
All of the following drugs are Class I anti-arrhythmic drugs EXCEPT: 
Select and explain. 
A. Quinidine, B. Procainamide, C. Flecainide, D. Propranolol
D: Propranolol
Answer: D: Propranolol 
Explanation: None