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Study the following and identify the correct combination.
Animal Respiration Circulation Excretion
1) Prawn Book gills Open type Green glands
2) Saccoglossus Gills Open type Proboscis gland
3) Dentalium Feather like gills Closed type Bojanus organ
4) Ophiura Gills Closed type Tube feet

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answer is B.

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Detailed Solution

Prawn respire through gills (not book gills).

Dentalium has open circulatory system.

In Ophiura, water vascular system helps in respiration.

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