alleryIn a blastocyst, the outer layer attaching to the endometrium is the *trophoblast*, and the inner cluster that differentiates into the embryo is the:
AMesoderm
BOuter cell mass
CInner cell mass
DEndoderm
Answer & Solution
Correct answer: C. Inner cell mass
Blastocyst: **trophoblast** (outer) attaches to endometrium and gives rise to extra-embryonic membranes
**inner cell mass** differentiates into the embryo proper.
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