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': 'Ewings sarcoma arises from - \nSelect and explain. \nA. G cells, B. Totipotent cells, C. Neuroectodermal cells, D. Neurons', 'role': 'user'}, {'content': "Answer: C \nExplanation: Histologically, Ewing's sarcoma has a certain resemblance to primitive neuroectodermal cells, and the tumor arises from such cells.\nIt is a rare malignancy primarily affecting children and adolescents. It arises mainly in bone and less commonly in soft tissues.\nIn these, there is a characteristic reciprocal chromosomal translocation, which leads to an in-frame fusion between the EWS gene and one of the ETS family gene members.", 'role': 'assistant'}]