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Excretory organs of different animals are given below. Match the animals with their respective excretory organs.
AnimalExcretory organ/Unit
$(a)$ Balanoglossus$(1)$ Metanephridia
$(b)$ Leech$(2)$ Nephridia
$(c)$ Locust$(3)$ Flame cells
$(d)$ Liver fluke$(4)$ Absent
$(e)$ Sea urchin$(5)$ Malpighian tubule
$(f)$ Pila$(6)$ Proboscis gland

Which one of the following is an excretory organ?

Match the following columns and select the correct option.
Column-$I$Column-$II$
$(a)$ Platyhelminthes$(i)$ Kidney
$(b)$ Aschelminthes$(ii)$ Flame cells
$(c)$ Protozoa$(iii)$ Green glands
$(d)$ Arthropoda$(iv)$ Excretory tube
$(e)$ Mammalia$(v)$ Contractile vacuole

$Assertion (S)$: In $Paramecium$,the contractile vacuole performs excretion.
$Reason (R)$: In $Planaria$,flame cells are present,which perform excretion.

Choose the correct pair.
Column-$I$Column-$II$
$(a)$ Protonephridia$(I)$ In crustaceans like prawns.
$(b)$ Nephridia$(II)$ In Platyhelminthes,rotifers,amphioxus.
$(c)$ Malpighian tubules$(III)$ In insects including cockroaches.
$(d)$ Green glands$(IV)$ In earthworms and other annelids.

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