Bipinnaria is the larva of

Water vascular system is present in $:-$

The perforated plate located at the aboral end of a starfish is known as:

Aristotle's lantern is found in .........

Role of the water vascular system in Echinoderms is :
$A.$ Respiration and Locomotion
$B.$ Excretion and Locomotion
$C.$ Capture and transport of food
$D.$ Digestion and Respiration
$E.$ Digestion and Excretion
Choose the correct answer from the options given below :

Assertion : Ambulacral system plays a major role in locomotion of echinoderm.
Reason : Hydraulic pressure of fluid and contraction of muscle of tube feet make possible movement of echinoderm.