Concept:The young proglottid is the newly formed segment found closest to the scolex and neck of a tapeworm.Explanation:A tapeworm is made up of segments called proglottids.New proglottids are continuously formed near the neck region.Therefore, the youngest proglottid is located just behind the scolex and neck.In the diagram, the label that points to this position is ii.Answer:D. ii
