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

  • A
    Arthropoda - Body divided into head,thorax,and abdomen; respiration by tracheal system.
  • B
    Chordata - Presence of a notochord at some stage and a separate anal and urinary opening.
  • C
    Echinodermata - Pentamerous radial symmetry and mostly internal fertilization.
  • D
    Mollusca - Usually oviparous and development through veliger or trochophore larvae.

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