i and iii

i and ii

iii and iv

ii and iii

secretion of Renin

release of Angiotensinogen

forming active Angiotensin II

constricting blood vessels and increase in BP

Osmoreceptors in hypothalamus stimulate ADH secretion.

ADH stimulates reabsorption of water from last part of DCT and entire collecting duct.

Urine volume increases.

Osmolarity of blood decreases.

$\mathrm{a}-\mathrm{i}-\mathrm{r}, \mathrm{b}-\mathrm{ii}-\mathrm{q}, \mathrm{c}-\mathrm{iii}-\mathrm{p}$

$\quad a-i i-p, b-i-q, c-i i i-r$

$\quad a-i-r, b-i i i-p, c-i i-q$

a - ii - q, b - iii - p, c-i - r