Reabsorption of glucose from the glomerular filtrate in the kidney tubule is carried out by

$I.$ Reabsorption of water occurs passively in the initial segment of nephron.
$II.$ Nitrogenous wastes are absorbed by active transport.
$III.$ Conditional reabsorption of $Na^{+}$ and water takes place in $DCT$.
$IV.$ $DCT$ reabsorbs glucose.
$V.$ $DCT$ is capable of selective secretion of $H^{+}$,$K^{+}$ and $NH_{3}$ to maintain $pH$ and $Na^{+}-K^{+}$ balance in blood.
$VI.$ Substances like glucose,amino acids,$Na^{+}$,etc.,in the filtrate are reabsorbed actively.
Choose the option with incorrect statements.

Brush-bordered epithelium (microvilli-bearing) is found in:

In which part of the nephron is reabsorption minimum from the filtrate?

Maximum water reabsorption occurs in

Which part of the nephron transports a small amount of urea into the medullary interstitium to maintain the osmolarity?