Choose the correct statements about the anatomy of the kidney :
I. Kidney is located dorsolaterally and it is a retroperitoneal organ
II. There are two major types of nephrons - cortical nephron and juxtamedullary nephron
III. Size of the filtration slit of glomerulus is 80 nm
IV. Bowman’s capsule opens into DCT followed by loop of Henle and further by PCT