Which of following systems is segmentally arranged in annelids?

Explanation

Option C: Annelids have a closed circulatory system, which means the blood circulates through a closed network of blood vessels. In some cases, such as with polychaete worms, the blood is pumped directly through self-contracting blood vessels. In other cases, blood is carried throughout the body from a central pumping organ, like the human heart. Moreover, the circulatory system is segmentally arranged throughout the segmented annelid. Option A: As explained this is an incorrect option. Option B: As explained this is an incorrect option. Option D: As explained above this is an incorrect option.