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: Pathology
[{'content': 'Gene affected in Ewings sarcoma is ? \nSelect and explain. \nA. EWS-FLI 1, B. PAX 3, C. EWS ATF 1, D. FUS-CHOP', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans, is 'a' i.e., EWS FLI 1", 'role': 'assistant'}]