A classic radiologic finding of a ‘sunburst’ pattern of periosteal reaction and a Codman triangle is most highly suspicious for:
AEwing sarcoma
BOsteoid osteoma
COsteosarcoma
DChondrosarcoma
Explanation: Osteosarcoma classically presents on plain radiographs with an aggressive periosteal reaction, such as a sunburst appearance or Codman triangle, representing lifting of the periosteum by the rapidly growing tumor.