<prompt> Bone dysplasia is invariably seen in -HyperparathyroidismOsteosarcomaDevelopmental defectOsteomalacia  <response>: Bone dysplasia is invariably seen in developmental disorders like dysplasias with predominantly physeal and metaphyseal changeseg.hereditary multiple exostosis, achondroplasia, predominantly epiphyseal changes eg.Trevors ds, stippled epiphysisand predominantly metaphyseal and diaphyseal changes eg. Pyles ds, marble bones. REF:Apleys system of ohopaedics- 9th edn- pg no158. 