What is common between an earthworm,a cockroach,and a centipede?

Match the following columns regarding the number of heart chambers in different animals:

Column-$I$	Column-$II$
$(a)$ Two-chambered	$(i)$ Peacock
$(b)$ Three-chambered	$(ii)$ Labeo
$(c)$ Incomplete four-chambered	$(iii)$ Ichthyophis
$(d)$ Four-chambered	$(iv)$ Lizard

Which of the following represents the correct combination without any exception?
Characteristics - Class

Match the following animals with their respective phyla and arrange them in the correct order as per the given list of animals: Animals: $Leucosolenia$,$Opalina$,$Planaria$,$Wuchereria$. Phyla: $Aschelminthes$,$Protozoa$,$Porifera$,$Platyhelminthes$.

What is true about $Nereis$,scorpion,cockroach,and silver fish?

Trochophore larva occurs in