The correct option is A Ctenophora
Phylum Ctenophora include comb jellies. They all have biradial symmetry, tissue level organisation. Biradial symmetry is a combination of radial and bilateral symmetry where the body components are arranged with similar parts on either side of a central axis and each of the four sides of the body is identical to the opposite side but different from the adjacent side. They are diploblastic.
Thus, the correct answer is option A.