Coxal glands are the excretory organs of .........

Match the following animals with their excretory organs $:-$

Animals	Excretory organs
$(A)$ Earthworm	$(i)$ Renette cell
$(B)$ Cockroach	$(ii)$ Nephridia
$(C)$ Taenia	$(iii)$ Malpighian tubules
$(D)$ Ascaris	$(iv)$ Flame cells

The green gland is its excretory organ.

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

In fishes,the kidney is:

When a marine water fish is kept in fresh water,it will die due to: