In which of the following is the respiratory pigment $Chlorocruorin$ found?

$A$: Annelids exhibit extracellular digestion.
$R$: The digestive tract in annelids is complete.

What is the phenomenon called where the body of some animals is externally and internally divided into segments with a serial repetition of at least some organs?

In which of the following is the segmentation best represented?

What is the location and function of parapodia or chitinous setae?

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