A) Amnion
B) Allantois
C) Yolk sac
D) Vitelline chorion
Correct Answer: B
Solution :
Alantois is the extraembryonic membrane that develops in embryonic reptiles, birds and mammals as a growth from the hindgut. It acts as a urinary bladder for the storage of waste products and as a means of providing the embryo with oxygen and food.
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