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Phyla and related characteristics are given below. Choose an appropriate option which fills the blank spaces.
Phylum/Class Excretory Organs Circulation Respiratory Organs
Arthropoda A Open Tracheae
B Metanephridia Open Gills
Amphibia C Closed D
A B C D
1 Nephridia Echinodermata Metanephridia Lungs
2 Malpighian tubules Mollusca Metanephridia Book gills
3 Mollusca Malpighian tubules Metanephridia Book gills
4 Malpighian tubules Mollusca Kidneys Lungs

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answer is D.

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Detailed Solution

Phylum/Class	Excretory organs	Circulation	Respiratory organs
Arthropoda	Malpighian tubules	Open	Tracheae
Mollusca	Metanephridia	Open	Gills
Amphibia	Kidney	Closed	Lungs

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