Which one of the following groups of three an | vedclass

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(C) $1$. $A$: Liver fluke (Platyhelminthes) is bilaterally symmetrical,but Sea anemone (Cnidaria) is radially symmetrical and Sea cucumber (Echinoderm

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Scorpion,Spider and Cockroach - Ventral solid central nervous system

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(C) $1$. $A$: Liver fluke (Platyhelminthes) is bilaterally symmetrical,but Sea anemone (Cnidaria) is radially symmetrical and Sea cucumber (Echinodermata) shows pentamerous radial symmetry in adults. Thus,this is incorrect.$2$. $B$: Centipede and Prawn (Arthropoda) have jointed appendages,but Sea urchin (Echinodermata) does not. Thus,this is incorrect.$3$. $C$: Scorpion,Spider,and Cockroach all belong to the phylum Arthropoda. $A$ characteristic feature of Arthropods is the presence of a ventral solid central nervous system. Thus,this is correct.$4$. $D$: Cockroach and Locust (Arthropoda) show metameric segmentation,but Tapeworm (Platyhelminthes) shows pseudometamerism (proglottids),not true metamerism. Thus,this is incorrect.

Column $I$	Column $II$
$A$. Organ level	$p$. Pheretima
$B$. Cellular aggregate level	$q$. Fasciola
$C$. Tissue level	$r$. Spongilla
$D$. Organ system level	$s$. Obelia

Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?

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Column $I$ Column $II$
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