Which of the following statements is correct?

Proximal convoluted tubule is lined by simple cuboidal brush border epithelium.

Small amounts of urea enter the thin segment of the ascending limb of Henle’s loop which is transported back to the interstitium by the collecting tubule.

Nearly all of the essential nutrients, and 70-80 per cent of electrolytes and water are reabsorbed by PCT.

Collecting duct is made of cuboidal epithelium mostly.