<prompt> A patient was staed on antihypeensive medications; developed renal failure, the drug offended is -Beta-blockerAlpha-blockerCalcium channel blockerACE inhibitor  <response>: Ans. is d i.e., ACE inhibitors o ACE inhibitors and angiotensin receptor antagonists can cause acute renal failure in patients with bilateral renal aery stenosis, stenosis of the aery to a single remaining kidney, hea failure, or volume depletion owing to diarrhea or diuretics. 