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In an amphibian blood entering the right atrium shows higher levels of oxygenation than that in left atrium when :

A.It is hyperactivated

B.it is hibernating

C.it is submerged

D.it is in the terrestrial habitat

I think it should be C.

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yes it is C .. but being submerged isn't just sufficient.. being submerged in a well oxygenated water would be a more precise answer.. –  WYSIWYG Nov 14 '13 at 11:30

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