<prompt> At equally natriuretic doses, which of the following drugs causes maximum potassium excretion?SpironolactoneFurosemideAcetazolamideAldosterone  <response>: CA inhibitors like acetazolamide decrease the secretion of H in the distal tubules and collecting ducts. Due to less reabsorption of sodium in the PCT, more is delivered to the distal tubules DT. Na is exchanged with K and H. At equally natriuretic doses, K excretion is maximum with CA inhibitors because Na delivered to the distal tubules is exchanged only with K excretion of H is inhibited by these drugs. 