Which of the following is a triploblastic animal with radial symmetry?
Echinoderms (Antedon) are triploblastic, radially symmetrical animals.
Platyhelminths (Planaria) are triploblastic bilaterally symmetrical organisms.
Cnidarinas (Adamsia) and Ctenophores (Ctenoplana) are diploblastic radially symmetrical organisms.