Multicellular, multinucleate, irregular mass of embryo which pass into uterine wall is

Ectoderm

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Endoderm

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Syncytiotrophoblast

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Amnion

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Solution

The correct option is D Syncytiotrophoblast
Syncytiotrophoblast is derived from the Greek word 'syn'- "together"; 'cytio'- "of cells"; 'tropho'- "nutrition"; 'blast'- "bud" is considered as the epithelial covering of the highly vascular multicellular, with various nucleus and irregular mass are embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother.
So the correct option is 'Syncytiotrophoblast'.

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