A) Channa
B) Loris
C) Dodo
D) Petromyzon
Correct Answer: D
Solution :
Petromyzon belongs to class-Cyclostomata, subphylum-Vertebrata of phylum-Chordata. The body of Petromyzon is eel-shaped, without scales, jaws and lateral fins. Mouth rounded and suctorial. Gills 5-16 pairs.
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