This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CHF, Angina Pectoris and Myocardial Infarction, Subject name: Pharmacology
[{'content': 'All of the following drugs are useful for long-term treatment of congestive hea failure except: \nSelect and explain. \nA. Digoxin, B. Ramipril, C. Dobutamine, D. Spironolactone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dobutamine is indicated only for the acute t/t of decompensated CHF. Cardiac glycosides (digoxin) can be used for acute treatment as well as maintenance therapy of CHF. ACE inhibitors and spironolactone are indicated only for chronic CHF.', 'role': 'assistant'}]