<prompt> A 50-year-old manhas a history of frequent episodes of renal colic with high calcium renal stones. The most useful diuretic in the treatment of recuurent calcium stones is:FurosemideSpironolactoneHydrochlohiazideAcetazolamide  <response>: Ref: KDT 6e p556 thiazides cause hypercalcemia by decreasing the renal excretion of Ca2. These are useful in a patient having hypercalciurea. In such a patient, thiazides decrease the excretion of Ca2 in the kidney and thus reduces the chances of stone formation. 