Similarity between fish and tadpole is

Which of the following organisms exhibit radial symmetry?

How many of the following phyla exhibit diploblastic and tissue-level organization?
Porifera,Coelenterata (Cnidaria),Ctenophora,Platyhelminthes,Aschelminthes

Which one of the following is not a nematode parasite?

Match the following and select the correct option:

Animal	Characteristics
$(a)$ Pila	$(1)$ Jointed appendages
$(b)$ Cockroach	$(2)$ Perching
$(c)$ Asterias	$(3)$ Water vascular system
$(d)$ Torpedo	$(4)$ Electric organ
$(e)$ Parrot	$(5)$ Presence of shell
$(f)$ Dog fish	$(6)$ Placoid scales

In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?