The correct option is B Vertebrae
∙ Bones are hard structures which together with cartilage form the skeletal system.
∙ Different types of bones make up different parts of the body. E.g., flat bones, small bones, long bones and irregular bones.
∙ Irregular bones as the name suggests are irregular in shape. Vertebrae is made up of irregular bones.
∙ 33 vertebrae together forms the vertebral column, which can be felt when we put our hands at the back as bumps.