Conditional reabsorption of  ${\mathrm{Na}}^{+}$ takes place in __A __in the presence of  __B__.

Mark the correct set of A and B.

	A	B
1.	PCT	ADH
2.	DCT	Aldosterone
3.	Loop of Henle	Aldosterone
4.	Collecting duct	ADH

A fall in glomerular blood pressure (GFR) activate Renin-Angiotensin-Aldosterone-System (RAAS). Aldosterone released from adrenal cortex causes conditional reabsorption of Na⁺ and water from the distal part of tubules. This leads to increase in GFR.