Violation

Which of the following bone lesions of the mandible is/are malignant? 1. Osteosarcoma. 2. Osteochondroma. 3. Ewing's tumor. 4. Fibrous dysplasia

(1) and (3)

(1) (2) (3)

(2) and (4)

(4) only

All of the above

Please describe the matter of abuse