Which of the following is the triploblastic, bilaterally symmetrical, coelomate with tracheal system for the respiration?
Organisms with triploblastic condition, bilaterally symmetry, eucoelom and tracheal system for respiration are insects (Arthropods). Example: Laccifer
Meandrina belongs to phylum Cnidaria.
Pleurobrachia belongs to phylum Ctenophora.
Hirudinaria belongs to phylum Annelida.