A 15 year old boy is injured while playing cricket.X-ray of the leg rule out of a possible fracture.The radiologist reports the boy has an evidence of aggressive bone tumor with both bone destruction and soft tissue mass.The bone biopsy reveals a bone cancer with neural differentiation.Which of the following is the most likely diagnosis ?

• A. Ewing's sarcoma
• B. Chondrablastoma
• C. Osteosarcoma
• D. Neuroblastoma