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Sinus venosus of Frog is formed by the u...

Sinus venosus of Frog is formed by the union of

A

Two pracavals and two post cavals

B

One precaval and two post cavals

C

One precaval and one post caval

D

Two precavals and one post caval

Text Solution

Verified by Experts

The correct Answer is:
D
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A: In frog, sinus-venosus is present. R: In mammals and birds are remnant of sinus venosus has taken part in the formation of SA node.