This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Characteristic feature of primary aldosteronism is - \nSelect and explain. \nA. Low serum sodium, B. High plasma renin, C. Low serum potassium, D. High serum creatinine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: hyper secretion of aldosterone increases renal distal tubular exchange of intra tubular sodium for secreted potassium and hydrogen ions, with progressive depletion of body potassium resulting in hypokalemia ( Harrison 17 pg 2260)', 'role': 'assistant'}]