<prompt> The 1st sign of TB is:Narrowing of intervertebral spaceRarefaction of vertebral bodiesDestruction of laminaeFusion of spinous processes  <response>: a- The earliest feature is loss of curvature due to paravertebral spasm.- The next radiological feature of spinal tuberculosis is reduction of intervertebral disk space and osteoporosis of two adjacent vertebrae sometimes with fuzziness of the endplates. 