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Question

........... is a living fossil.

A
Drepanaspis
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B
Lamprey
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C
Cephalaspis
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D
All of the above
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Solution

The correct option is C Lamprey
Lamprey are jawless fish of the order Petromyzontiformes, placed in the superclass Cyclostomata. They are well known for boring into the flesh of other fish to suck their blood. They are considered as Living fossil because the specimen found in an South African lagoon shows that, the lamprey hasn't changed much in last 360 million years.
Therefore, the correct answer is option B.

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