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Q.

Study the following and identify the correct combination.

 AnimalRespiration CirculationExcretion  
1)PrawnBook gillsOpen typeGreen glands
2)SaccoglossusGillsOpen typeProboscis gland
3)DentaliumFeather like gillsClosed typeBojanus organ
4)OphiuraGillsClosed typeTube feet

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a

1

b

2

c

3

d

4

answer is B.

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Detailed Solution

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Prawn respire through gills (not book gills).

Dentalium has open circulatory system.

In Ophiura, water vascular system helps in respiration.

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Study the following and identify the correct combination. AnimalRespiration CirculationExcretion  1)PrawnBook gillsOpen typeGreen glands2)SaccoglossusGillsOpen typeProboscis gland3)DentaliumFeather like gillsClosed typeBojanus organ4)OphiuraGillsClosed typeTube feet