In most annelids,excretion occurs through . . . . . . .

In which of the following is the segmentation best represented?

Read the following four statements $(A-D)$:
$(A)$ Annelids possess only longitudinal muscles which help in locomotion.
$(B)$ Nephridia do not help in excretion and osmoregulation.
$(C)$ Closed type circulatory system is present in most of annelids.
$(D)$ Members of phylum Annelida are triploblastic,metamerically segmented,and acoelomate.
How many of the above statements are incorrect?

Which one of the following is not a characteristic of Phylum $Annelida$?

Leech is:

The phylum $Annelida$ is named so because of: