<prompt> All are nephrotoxic, EXCEPTLithiumGentamicinChlorpromazineCephalosporins  <response>: Ans. is c i.e., Chlorpromazine Nephrotoxic drugs:Lithium - Causes Nephrogenic diabetes insipidusCephalosporins - Cause interstitial nephritis and acute tubular necrosis cephaloridineGentamicin - Causes injury to proximal tubular cells leading to acute renal failure.Also knowMost nephrotoxic cephalosporin - Cephaloridine Most nephrotoxic aminoglycoside - Neomycin Least nephrotoxic aminoglycoside - Streptomycin 