<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 24-year-old man is brought to the physician because of increasing pain and swelling of the left knee for 2 months. The pain has awoken him from his sleep on multiple occasions. He tried ibuprofen but has had no relief of his symptoms. There is no family or personal history of serious illness. Vital signs are within normal limits. On examination, the left knee is mildly swollen and tender; range of motion is limited by pain. An x-ray of the left knee is shown. Which of the following is the most likely diagnosis?? A: Chondrosarcoma, B: Fibrous dysplasia, C: Aneurysmal bone cyst, D: Osteoclastoma, E: Ewing sarcoma,  <response>: This is a clinical vignette describing a 24-year-old man with 2 months of worsening left knee pain and swelling that is waking him up at night, not relieved by ibuprofen. Imaging shows a lytic lesion in the distal left femur. The choices given are different bone tumors. Based on the patients age and the imaging, the most likely diagnosis is osteosarcoma osteoclastoma. Chondrosarcoma and Ewing sarcoma are less likely in a 24-year-old. Fibrous dysplasia and aneurysmal bone cyst do not typically cause pain that wakes patients up at night.D: Osteoclastoma 