One very special feature in the earthworm Pheretima is that

Options

A. a) fertilisation of eggs occurs inside the body
B. b) the typhlosole greatly increases the effective absorption area of intestine
C. c) the S-shaped setae embedded in the integument are the defensive weapons used against the enemies
D. d) it has a long dorsal tubular heart

Answer

B

Explanation

From the `27^(th)` segement upto 23 - 25 segment in front of the anus in intestine of earthworm, lies a highly glandular and vascular part called tyhlosole. It greatly increases the effective absorption area for digested food in the intestine.