The main function of pedicellariae in $Asterias$ is:

Match List-$I$ with List-$II$:

List-$I$ (Biological Name)	List-$II$ (Common Name)
$A$. Asterias	$I$. Sea urchin
$B$. Antedon	$II$. Brittle star
$C$. Echinus	$III$. Sea lily
$D$. Ophiura	$IV$. Star fish

Choose the correct answer from the options given below:

In which animal is the water vascular system found?

Animals that exhibit bilateral symmetry in the larval stage and radial (pentamerous) symmetry in the adult stage belong to the phylum:

$A$ special feature of Evisceration (Autotomy) is found in

Which of the following statements is true regarding $Echinodermata$?