A) Silver fish
B) Dogfish
C) Crayfish
D) Starfish
Correct Answer: B
Solution :
[b] Elasmobranchii (dog fish) is one of the two subclasses of cartilaginous fish in the class chondrichthyes, the other being holocephali. Members of elasmobranchii subclass have no swim bladders, five to seven pairs of gills clefts opening individually to the exterior, rigid dorsal fins, and some placoid scales.
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