Question

Gastrulation is the process which involves the differentiation of the following layers in a vertebrate embryo [NCERT 1981]
A) Ectoderm and mesoderm
B) Ectoderm and endoderm
C) Endoderm and mesoderm
D) Ectoderm, endoderm and mesoderm

Answer 1

d is 100 percent correct

Answer 2

Gastrulation is the process of the embryonic development during which cell movements establish the three primary germinal layers namely ectoderm, mesoderm, and endoderm.

So D is the correct answer

I hope it will help you
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