This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Which of the following is assosciated with poor prognosis in Ewings sarcoma DELETE \nSelect and explain. \nA. B2 microglobulin, B. Fever, C. Thrombocytosis, D. Young age', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fever,anemia and elevation of laboratory values have been repoed to indicate more extensive disease and a worse diagnosis Refer Campbells ohopedic 13th/e p 953', 'role': 'assistant'}]