Setae help in locomotion in earthworm but are not uniformly present in all the segments. They are present in
a. Clitellar segment
b. 20th - 22nd segment
c. Last segment
d. First segment
Answer- The answer is the option (b) 20th -22nd segment
Explanation: - The setae assist in the locomotion process of the earthworm. The setae are located in every segment except for three parts. These three parts are- the first segment, the clitellar segment and the last segment.