Choose the correct pair regarding urine formation.

$A$: Birds have metanephric kidneys and no urinary bladder.
$R$: South American Ostrich has a urinary bladder.

Cholera patients are given saline solution because .......

Identify the true statements and choose the correct option accordingly.
$I.$ Blood vessel leading to the glomerulus is called efferent arteriole.
$II.$ Vasa-recta,peritubular capillaries and glomerulus,all have blood.
$III.$ Cortical nephrons have highly reduced vasa-recta.
$IV.$ Vasa-recta runs parallel to the Henle's loop in the juxta-medullary nephron.

Match the items given in Column $I$ with those in Column $II$ and select the correct option given below:

Column $I$ (Function)	Column $II$ (Part of Excretory System)
$(a)$ Ultrafiltration	$(i)$ Henle's loop
$(b)$ Concentration of urine	$(ii)$ Ureter
$(c)$ Transport of urine	$(iii)$ Urinary bladder
$(d)$ Storage of urine	$(iv)$ Malpighian corpuscle
	$(v)$ Proximal convoluted tubule

Choose the incorrect sentence.