A) sycon - Water vascular system
B) Sea-urchin - canal system
C) Hook worm - Pseudocoel
D) Cray fish - Skeletal system
E) None of the above
Correct Answer: C
Solution :
Hook worms are the small parasitic namatodes of family-Ancylostomatidae that worm hooked mouth parts to attach themselves to the intestinal wall of the host. They possess pseudocoel body cavity.
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