Which of the following respiratory pigments is found in the coelomic fluid of certain annelids?

In the animal kingdom,the first time appearance of a true coelom is present in:

The body is segmented in:

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

$A$: The first circulatory system is observed in the phylum Annelida.
$R$: The first true coelom is observed in the phylum Annelida.

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?