The correct option is A Echinodermata
Deuterostomia is a group of animals including those of the phyla Echinodermata (like Starfish, sea urchins), Chordata (like sea squirts, lancelets, and vertebrates), Chaetognatha (like arrow worms) and Brachiopoda (like lamp shells) - classified together on the basis of embryological development and by molecular criteria.
So, the correct answer is option A.