Refer the given figures A, B, C and D and identify the option which shows their correct name. 

Aurelia is a genus of scyphozoan jellyfish (Cnidaria, Scyphozoa). Adamsia is a genus of sea anemones. It is usually found growing on a gastropod shell inhabited by the hermit crab, Pagurus prideaux. A cnidocytes (also known as a cnidoblast or nematocyte) is an explosive cell containing one giant secretory organelle that defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). Pleurobranchus is a genus of sea slugs, specifically side-gill slugs, marine gastropod mollusc.