A) Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
B) Mollusca- Normally oviparous and development through a trochophore or veliger larva
C) Arthropoda - Body is divided into head, thorax and abdomen and respiration by tracheae
D) Chordata - Notochord at some stage and separate anal and urinary opening to the outside
Correct Answer: C
Solution :
Arthropoda is the largest phylum of kingdom animals. It possess an outer body layer the cuticle. The body is compared of segment usual forming distinct specialised body region, i.e. head, thorax and abdomen. Respiratory organs consist of book gill or gills in the aquatic and semiaquatic arthropods and book lungs or tracheae in the terrestrial form.
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