<prompt> Holdswoh classification of thoracolumbar spine fracture is based on how many columns of spine?TwoThreeFiveFour  <response>: Answer- A. TwoHoldswoh,s proposed two column concept of thoracolumbar spine fractureAntetior column : Consists veebral body, annulus fibrous, Anterior and posterior longitudinal ligamentsposterior column: Consists of veebral arch pedicle, facets, laminae and posterior ligaments ligamentum flavum,interspinous and supraspinus ligament 