Characteristic feature of primary aldosteronism is -: (A) Low serum sodium, (B) High plasma renin, (C) Low serum potassium, (D) High serum creatinine
Answer is C. 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)