<prompt> Pre-cancerous lesion of bone-Paget diseaseChronic osteomyelitisBenign giant cell tumorAil of above  <response>: Ans. is d i.e., All of above Pre-cancerous lesion of boneMultiple exostosesOlliers diseaseBenign giant cell tumorOsteoblastomaChondroblastomaChronic osteomyelitisPagets disease 