The neurenteric canal opens to the outside by

Mouth

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Blastopore

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Neuropore

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None of the above

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Solution

The correct option is B Blastopore
The neurenteric canal in the primitive streak at the front end and the cloacal membrane at hind of embryonic development, represent the primitive mouth or blastopore of lower invertebrate animal types.
So the correct option is 'Blastopore.'

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