Q. Hydroskeleton is not found in
A) Mollusca
B) Echinoderms
C) Annelida
D) Cnidarian
Explanation
Hydroskeleton is found in and Annelids, echinoderms and other invertebrate for respiration
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.