When does glomerular filtration occurs in Bowman's capsule?

Identify the incorrect matching:

a) Peritubular capillaries - The efferent arteriole emerging from the glomerulus forms a fine capillary network around the renal tubule

b) Vasa recta - A minute blood vessel network runs parallel to the Henle's loop forming a '$\mathrm{U}$' shaped structure

c) Cortical nephrons- Vasa recta is absent or highly reduced.

d) Blood filtered per minute-$180$ litres

Which of the following statement is/are correct?
i. Re-absorption of water occurs passively in the initial segment of the nephron.
ii. Nitrogenous wastes are absorbed by passive transport.
ii. Conditional re-absorption of ${\mathrm{Na}}^{+}$ and water takes place in $\mathrm{DCT}.$
iv. DCT re-absorbs ${\mathrm{HCO}}_3$
v. DCT is capable of selective secretion of ${\mathrm{H}}^{+},{\mathrm{K}}^{+}$ and ${\mathrm{NH}}_3$ to maintain $\mathrm{pH}$ and ${\mathrm{Na}}^{+}-{\mathrm{K}}^{+}$ balance in the blood
vi. Substances like glucose, amino acids, ${\mathrm{Na}}^{+},$ etc., in the filtrate, are re-absorbed actively