<prompt> Bone forming tumors are -a Osteosarcomab Osteoid osteomac Giant cell tumourd Osteoblastomae Chondrosarcomaabdbcdabcab  <response>: Bone forming tumors Benign : - Osteoma, Osteoid osteoma, Osteoblastoma.Malignant : - Osteosarcoma 