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
The potent anti — arrhythmic drug which has little negative ionotropic effect valuable in patients with poor left ventricular function 
Select and explain. 
A. Amlodipine, B. Bidoprolo, C. Amiodarnone, D. Digoxin
D: Digoxin
Answer: D: Digoxin 
Explanation: None