Match the following parts of a nephron with their function:

$(a)$ 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
  $(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)$
• B
  $(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)$
• C
  $(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)$
• D
  $(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)$