Which of the following animals belong to the same phylum?
Dentalium, Aplysia, Pinctada, Caetopleura, Loligo - Mollusca
Echinus, Cucumaria - Echinodermata
Balanoglossus, Saccoglossus - Hemichordata
Amphioxus - Chordata
Laccifer, Limulus - Arthropoda;