<prompt> A 45 year old man, known case of chronic renal failure develops rugger jersey spine. The probable cause isAluminium intoxicationSecondary hyperparathyroidismOsteoporosisOsteomalacia  <response>: Answer is B Secondary Hyperparathyroidism: Rugger .Jersey Spine is characteristically found in secondary hyperparathyroidism Renal osteodystrophy in CRF. 