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