The extra-embryonic membranes of mammalian embryo are derived from
Formative cells
Follicle ceIls
Trophoblast
Inner cell mass
A
Trophoblast
B
Formative cells
C
Follicle ceIls
D
Inner cell mass
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Solution
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Trophoblast in mammalian embryo produces extra embryonic membranes. Extra embryonic membranes provide protection and nourishment to foetus. These are of 4 types-chorion, amnion, allantois and yolk sac, embryonic membranes. Chorion is the outermost extraembryonic membrane while amnion is the innermost extraembryonic membrane.
Therefore, the correct answer is option A.
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