Termination of gastrulation is rnarked by

Closure of primitive gut

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Obliteration of archenteron

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Obliteration of blastocoel

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Closure of neural tube

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Solution

The correct option is D Obliteration of blastocoel
Complete obliteration of blastocoels cavity marks the end of gastrulation. The net result of gastrulation is that the various presumptive areas of blastular wall come to lie in their definite positions with respect to the anterio-posterior axis of future embryo.

So, the correct option is 'option C'.

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