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
Most potent loop diuretic is : 
Select and explain. 
A. Furosemide, B. Bumetanide, C. Torsemide, D. Ethacrynic acid
B: Bumetanide
Answer: B: Bumetanide 
Explanation: Bumetanide is most potent and torsemide is the longest acting loop diuretic.