The animal which does not show any metamorphosis or larval stage is

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

$A$: Annelids exhibit metameric segmentation.
$R$: The body of an annelid is divided into two equal halves by a single plane.

Which one of the following does not have a larval stage in its life cycle?

Which one of the following is not a characteristic of Phylum $Annelida$?

Haemoglobin is dissolved in the blood plasma of: