Match the following parts of a nephron with their function:

	Column I		Column II
(a)	Descending limb of Henle's loop	(i)	Reabsorption of salts only
(b)	Proximal convoluted tubule	(ii)	Reabsorption of water only
(c)	Ascending limb of Henle's loop	(iii)	Conditional reabsorption of Sodium ion and water
(d)	Distal convoluted tubule	(iv)	Reabsorption of ion, water and organic nutrients

Select the correct option from the following :

	a	b	c	d
1	i	iii	ii	iv
2	ii	iv	i	iii
3	i	iv	ii	iii
4	iv	i	iii	ii