In $Pheretima$,the organisms obtain their nutrition from:

Chromophil cells in earthworms are found in the........

If a live earthworm is pricked with a needle on its outer surface without damaging its gut,the fluid that comes out is

Assertion : Typhlosole increases the effective area of absorption in the intestine.
Reason : Typhlosole,present in the intestine,is the characteristic feature of cockroach.

$A$ transverse section of $Pheretima$ taken through the $10^{th}$ segment is observed under a microscope. Which of the following structures can be observed in the section?

To which class does the earthworm belong?