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Question : Assertion (A) : Blood circulation in fish heart is called double circulation.Reason (R) : Oxygenated and deoxygenated blood are not kept separated in fishes heart.

Answer»

Both (A) and (R) are true and (R) is CORRECT EXPLANATION of the assertion.
Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
(A) is true but (R) is false.
(A) is false bu (R) is true.

Solution :Fishes have single CIRCULATION and hencethere is mixing of oxygenated and de-oxygenated blood .


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