In an adult Unilateral smooth contracted kidney with hypeension is seen in -

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.