Which of the following features is not present in the phylum Arthropoda?

Arthropods have a rigid chitinous exoskeleton that covers their complete body. Arthropods are characterized by the segmented body with repetitions of organs and tissues at interval i.e. metameric segmentation. Also, they have paired, jointed appendages to perform different functions. Parapodia are fleshy paired appendages of annelids. So the correct answer is option C