<prompt> In diabetes insipidus, diuretic showing paradoxical antiduretic activity -ThiazideTriamtereneSpironolactoneFurosemide  <response>: Ans. is a i.e., Thiazide Thiazide diuretics paradoxically decrease urine output in DI due to formation of cAMP in distal tubules effective in both central and nephrogenic DI. 