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

Options

A. Echinodermata- pentamerous radial symmetry and mostly internal fertilisation
B. Mollusca- normally oviparous and development through a trochophore or veliger larva
C. Arthropoda- body divided into head, thorax and abdomen and respiration by mouth
D. Chordata - notochord persists throughout and separate anal and urinary openings to the outside

Answer

B