This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diuretic, Subject name: Pharmacology
[{'content': 'Amiloride can cause hyperkalemia due to its action on: \nSelect and explain. \nA. Potassium channel, B. Sodium channel, C. Na+ Cl- symporter, D. H+K+ATP ase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Sodium channelAmiloride and triamterene are K+ sparing diuretic, they act by inhibiting epithelial Na+ channel. When they inhibit the sodium channel, there is no generation of electrical gradient and thus potassium and hydrogen are not excreted. They may be responsible for hyperkalemia.', 'role': 'assistant'}]