Assertion : Water vascular system is the characteristic of echinoderms. Reason : Main function of water vascular system is locomotion.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false

Assertion : Water vascular system is the characteristic of echinoderms

1.	Assertion : Water vascular system is the characteristic of echinoderms. Reason : Main function of water vascular system is locomotion.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false
Answer» Correct Answer - B Water vascular system or ambulacral system is a unique system of echinoderms which helps mainly in locomotion. It is infact a modified part of coelom consisting of a system of canals containing sea water and amoeboid corpuscles. It helps in locomotion by providing a hydraulic pressure mechanism of tube feet may serve for respiratory exchange of gases. Tube feet also help in anchoring the body to substratum and in capturing and handling the food.