A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: C
Solution :
Each ambulacral groove of echinoderms contains two double rows of short, tubular retractile projections, called as podia or tube feet, that end in suckers. Tube feet are characteristic organs of echinoderms serving variously for locomotion, capturing of food, respiration etc.
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