Which one of the following phyla is correctly matched with its two general characteristics?

  • A
    Echinodermata: pentamerous radial symmetry and mostly internal fertilization
  • B
    Mollusca: normally oviparous and development through a trochophore or veliger larva
  • C
    Arthropoda: body divided into head,thorax and abdomen and respiration by tracheae
  • D
    Chordata: notochord at some stage and separate anal and urinary openings to the outside

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