Excretory organ found in earthworm and other annelids is

Flame cells are also called $A$ and they are found in animals like $B$.

The excretory organ of flatworms/Taenia is .........

Match the excretory organs listed under column $I$ with the animals given under column $II$. Choose the answer which gives the correct combination of alphabets of the two columns.

Column $I$ (Excretory organs)	Column $II$ (Animals)
$A$. Nephridia	$p$. Hydra
$B$. Malpighian tubules	$q$. Leech
$C$. Protonephridia	$r$. Shark
$D$. Kidneys	$s$. Round worms,$t$. Cockroach

$A$: In Paramecium,the contractile vacuole performs excretion.
$R$: 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.