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: Medicine
[{'content': 'In a patient with chronic congestive cardiac-failure, all of the following drugs prolong survival except : \nSelect and explain. \nA. Metoprolol, B. Carvedilol, C. Enalapril, D. Digoxin', 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is D (Digoxin) `Digitalis does not improve survival in patients with hea failure and sinus rhythm.' It reduces symptoms of hea failure and need for hospitalization. ACE inhibitors (Corvedilol and enalapril) and Betablockers (Metaprolol) prolong life. `ACE inhibitors improve symptoms and prolong life' -- Oxford handbook 5th/122 ACE inhibitors.", 'role': 'assistant'}]