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Choose the false statement regarding Petromyzon.

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The body is devoid of scales and median fins.

Mouth is circular and sucking, without jaws.

It migrates to freshwater for spawning.

It has a closed type of circulatory system.

answer is A.

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Detailed Solution

The body of Petromyzon is devoid of scales and paired fins. It possesses median fins (unpaired fins).

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