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': 'Most potent loop diuretic is : \nSelect and explain. \nA. Furosemide, B. Bumetanide, C. Torsemide, D. Ethacrynic acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bumetanide is most potent and torsemide is the longest acting loop diuretic.', 'role': 'assistant'}]