<prompt> In an adult Unilateral smooth contracted kidney with hypeension is seen in -Stenosis of renal aerChr. GNRenal cell CAPyelonephritis  <response>: Ans. is a i.e., Stenosis of renal aeryAmongst the given options only stenosis of renal aery results in smooth contracted kidney :?o Unilateral renal aery stenosis is relatively uncommon cause of hypeension 2.5 of cases kidney shows diffuse ischemic atrophy, reduced size.o Chronic GN - kidney is symmetrically contracted and has diffusely granular not smooth coical surface. o Pyelonephritis chronic - Kidneys are irregularly scarred.o Renal Cell Ca - No smoothness, irrugular surface of kidney is seen. 