A 47 year old man presents with proteinuria+, BP=160/95mmHg, small kidneys that have smooth renal pelvis. What is the most probable dx?

The key is A. GN. [In chr. Pyelonephritis US will demonstrate renal scarring and urinalysis will demonstrate pyuria which are absent here. In renal artery stenosis there will be considerable difference in kidney size from one another which is not found here. Here likely diagnosis is GN].