a. 1st segment

b. Last segment

c. Clitellar segment

d. 20th – 22nd segment

The correct answer is B

Explaination –

The last segment is called the periproct and contains the anus. Except for first and last segment all other segment of earthworm have eight setae located around each segment. The setae look like a small bristles that is sticking out of the earthworm’s skin.