Solid,ventral,one pair of nerve cord found in the members of which phylum?

In leeches,the suckers are located at .........

In which of the following animals is hemoglobin dissolved in the blood plasma?

The distinctive feature of $Phylum$ $Annelida$ is:

What does a sandworm (Nereis) possess for locomotion?

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?