The clitellum is a distinct part in the body of earthworm, it is found in
1. segment 13-14-15
2. segment 14-15-16
3. segment 12-13-14
4. segment 15-16-17
Setae help in locomotion in earthworm but are not uniformly, present in all the segments. They are present in
1. 1st segment
2. last segment
3. clitellar segment
4. 20th - 22nd segment