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Extra-embryonic membranes of the mammalian embryo are derived from
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- inner cell mass
- trophoblast
- formative cells
- follicle cells
Correct Option: B
Four extra-embryonic membranes are present in mammals which originally arise from trophoblast viz. amnion, chorion, allantois and yolk sac. The trophoblast is the outermost layer of cells in morula.
