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
Drugs associated with clinically useful or physiologically important positive inotropic effects include all of the following except: 
Select and explain. 
A. Amrinone, B. Enalapril, C. Digoxin, D. Dobutamine
B: Enalapril
Answer: B: Enalapril 
Explanation: None