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[A] : in amphibians heart is two chamber...

[A] : in amphibians heart is two chambered.
[R]: The oxygenated blood is returned to the heart through sinus venosus.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
D
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