The typhlosole in earthworm is related with

One of the traditional uses of earthworms is..........

The famous Indian scientist who described Pheretima posthuma is ...........

Choose the correct option for the following statements:
$(i)$ Earthworms have $4$ pairs of lateral hearts.
$(ii)$ The excretory organs of earthworms are nephridia.

What is the function of setae?

The blood of an earthworm is red because its haemoglobin is: