Which of the following animals have tube within tube body plan evolved along deuterostomic evolutionary line?

Which of the following animals have tube within tube body plan evolved along deuterostomic evolutionary line?

Q. Which of the following animals have tube within tube body plan evolved along deuterostomic evolutionary line?

A.            Annelids

B.            Arthropods

C.            Echinoderms

D.            Molluscs

Answer: Echinoderms

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