The placenta in mammals is formed by- A. Allantois B. Chorion and allantois C. Amnion tra...
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The placenta in mammals is formed by- A. Allantois B. Chorion and allantois C. Amnion tra D. Yolk sac The placenta in mammals is formed by- A. Allantois B. Chorion and allantois C. Amnion tra D. Yolk sac
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