Mark the odd member from the following:

Identify the animals given below.

Which of the following represents a correct match of a somatic feature and the animal possessing it?

True fishes possess gills and fins. Which of the following is not a true fish?

Match the following organisms with their respective characteristics:

$(a)$ Pila	$(i)$ Flame cells
$(b)$ Bombyx	$(ii)$ Comb plates
$(c)$ Pleurobrachia	$(iii)$ Radula
$(d)$ Taenia	$(iv)$ Malpighian tubules

Select the correct option from the following:

Give the characteristic features of the following,citing one example of each:
$(a)$ Chondrichthyes and Osteichthyes
$(b)$ Urochordata and Cephalochordata