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| Column $-I$ (Organism) | Column $-II$ (Excretory Structure) |
| $A$. Cockroach | $I$. Nephridia |
| $B$. Cat fish | $II$. Malpighian tubules |
| $C$. Earthworm | $III$. Kidneys |
| $D$. Balanoglossus | $IV$. Flame cells |
| $E$. Flatworm | $V$. Proboscis gland |
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