The correct option is
D a(iv), b(iii), c(ii), d(i)
Solution: The correct answer for this question is option D.
Explanation:- 1.Euspongia belongs to phylum porifera, Choanocytes are specialized cells found in the sponges, they are also called collar cells.
2.Pila (garden snail) belongs to Phylum Mollusca, Molluscans have a rasping organ which is called radula. Radula is a feature of molluscans
3.Planarians belongs to Phylum Platyhelminthes of the invertebrate group, these are also called flat worms. Flame cells are the excretory cells in the flat worms, Flame cells are a characteristic feature of Planaria.
4.Meandrina belongs to phylum Cnidaria, Cnidarians have specialized stinging cells called Nematocytes. So Nematocytes are a feature of Cnidarians.