The primary site of action of triameterene and spironolactone is the -: (A) Proximal tubule, (B) Distal tubule, (C) Ascending Loop of Henle, (D) Descending Loop of Henle
Answer is B. Ans. is 'b' i.e., Distal tubule o Potassium sparing diuretics (Sprionolactone and triameterene) act on late distal tubule and collecting duct.