The correct option is C mammals
Intervertebral discs are found in the vertebral column of mammals. These are present between the adjacent vertebrae from second cervical vertebra to the sacrum. Each disc consists of an outer fibrous ring made of fibrocartilage and an inner soft pulpy, highly elastic substance. This disc is majorly involved in formation of strong joints that permits various movements of the vertebral column and absorb vertical shocks. Intervertebral disc is not found in the vertebral column of fishes or amphibians. Arthropods do not have vertebral column.