Assertion :Hemichordata are connecting link between Chordata and Nonchordata. Reason: In vertebrates the origin of coelom is schizocoelic formed by splitting of mesoderm, whereas all invertebrates except echinoderms are enterocoelic.

Both assertion and reason are correct and the reason is the correct explanation for Assertion.

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Both assertion and reason are correct but reason is not the correct explanation for assertion.

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Assertion is correct but reason is incorrect.

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Assertion is incorrect but reason is correct.

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Solution

The correct option is C Assertion is correct but reason is incorrect.
Echinoderms are considered as connecting links between chordata and non-chordata. Invertebrates along with echinoderms, the origin of the coelom are enterocoelic and not schizocoelic, which develops as mesodermal pouches arising from the gut of the embryo and so it is considered as connecting link chordates and non-chordates.
Hence, option C is correct.

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