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
[{'content': 'The drug of choice for acute left ventricular failure? \nSelect and explain. \nA. IV furosemide, B. IV Aminophylline, C. IV digitalization, D. Rapid digitalization', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., IV furosemide o A loop diuretics, e.g. furosemide is the mainstay of therapy.", 'role': 'assistant'}]