In which one of the following the genus name, its two characters and its phylum are not correctly mathced. Whereas the remaining three are correct.

Option (a) is incorrect because molluscs are bilaterally symmetrical, triploblastic, coelomate, soft bodied animals. Their soft body is covered by a calcareous shell and is unsegmented with a distinct head, muscular foot nad visceral hump
e.g. Pila (apple snail), Sepia (cuttle fish), Pinctada (pear) oyster), etc.