In mammalian embryo the pulmonary aorta ...

In mammalian embryo the pulmonary aorta communicates with carotico-systemic aorta by a narrow ductus arteriosus, in the adult this connection closes learving `:-`

A

Carotico-pulmonary aperture

B

ligamentum arteriosus

C

fossa ovalis

D

none of the above

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The correct Answer is:

B

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