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 drug of choice for acute left ventricular failure? 
Select and explain. 
A. IV furosemide, B. IV Aminophylline, C. IV digitalization, D. Rapid digitalization
A: IV furosemide
Answer: A: IV furosemide 
Explanation: Ans. is 'a' i.e., IV furosemide o A loop diuretics, e.g. furosemide is the mainstay of therapy.