The lamprey (Petromyzon) is included in the same category of:
A
Chamaeleon (Anolis)
B
Hag fish (Myxine)
C
Salamander (Ambystoma)
D
Lung fish (Neoceratodus)
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Solution
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Petromyzon (Lamprey) and Myxine (Hagfish) both belong to the class Cyclostomata.
Cyclostomes are jawless vertebrates. They are characterized by having an elongated eel-like body, circular mouth, slimy skin and are scaleless.
So, the correct answer is B
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