<prompt> Which one of the following benign tumors can metastasize to the lung?Osteoid osteoma.Non-ossifying fibroma.Hemangioma.Chondroblastoma  <response>: Ans. D. Chondroblastoma.Benign skeletal tumors rarely if ever metastasize to lung. The two exceptions to this rule are giant cell tumor up to 10 metastasize to lung and chondroblastoma 