Which of the following is not a locomotory organ of protozoa?

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 of the following is an example of the class $Polychaeta$?

Which of the following is a coelomate animal phylum?

Which of the following is hermaphrodite?

Larval stages are absent in the life cycle of . . . . . . .