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Assertion: Ambulacral system plays major role in locomotion of echinoderm.
Reason: Hydrauluc pressure of luid and contraction of muscle of tube feet make possible movement of echinoderm.
A. IF both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
D.

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Correct Answer - A

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