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Question

Arms are not sharply delimited from central disc in____________.

A
Ophiuroidea
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B
Asteroidea
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C
Crinoidea
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D
Both A and B
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Solution

The correct option is C Asteroidea
In case of Asteroidea, the body is star shaped with five radiating arms, which are not sharply delimited from central disc.

So, the correct answer is 'B'.

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