To solve this problem, we need to match the organisms with their respective characteristics. Let's analyze each organism:$\newline \bullet$(a) Pila:$\newline$ - Pila is a genus of freshwater snails, which are mollusks.$\newline$ - They possess a radula, which is a tongue-like organ with chitinous teeth used for feeding.$\newline$ - Therefore, Pila matches with (iii) Radula.$\newline \bullet$(b) Bombyx:$\newline$ - Bombyx refers to the silkworm, which is an insect.$\newline$ - Insects have Malpighian tubules for excretion.$\newline$ - Therefore, Bombyx matches with (iv) Malpighian tubules.$\newline \bullet$(c) Pleurobrachia:$\newline$ - Pleurobrachia is a genus of comb jellies, which are marine invertebrates.$\newline$ - They have comb plates, which are used for locomotion.$\newline$ - Therefore, Pleurobrachia matches with (ii) Comb plates.$\newline \bullet$(d) Taenia:$\newline$ - Taenia is a genus of tapeworms, which are parasitic flatworms.$\newline$ - They have flame cells, which are involved in excretion and osmoregulation.$\newline$ - Therefore, Taenia matches with (i) Flame cells.$\newline$Now, let's match the items from Column I with Column II:$\newline (a) \rightarrow (iii), (b) \rightarrow (iv), (c) \rightarrow (ii), (d) \rightarrow (i) \newline$This corresponds to Option 2.