<prompt> Rugger-jersey spine in X-rays is a feature of:HypoparathyroidismPseudo hypoparathyroidismPseudo hypoparathyroidismRenal osteodystrophy  <response>: Ans. D. Renal osteodystrophyRugger-jersey spine resembling the stripes on rugby jerseys means horizontal sclerosis subjacent to vertebral endplates with intervening normal osseous density its causes include hyperparathyroidism as seen in crf, myelofibrosis. 