Animals having multiple or numerous setae are included under

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

Closed blood vascular system,presence of hemoglobin in the blood,and chitinous setae or parapodia are the characteristics of which phylum?

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 respiratory pigment is present in the animals of the phylum Annelida?

The first circulatory system is observed in the members of this phylum.