<prompt> Pre-cancerous lesion of bone?Paget diseaseChronic osteomyelitisBenign giant cell tumorAll of above  <response>: Ans. is d i.e., All of above Pre-cancerous lesion of bone Multiple exostoses Olliers disease Benign giant cell tumor Osteoblastoma Chondroblastoma Chronic osteomyelitis Pagets disease 