The correct option is C Pleurobrachia
Comb plates are a characteristic feature of Ctenophores, i.e., Pleurobrachia. It has eight external rows of ciliated comb plates which help in locomotion. Hence, these organisms are also known as comb jellies.
Ascaris and Planaria are in Phylum Aschelminthes and Platyhelminthes respectively. Aurelia is in Phylum Cnidaria or Coelenterata.