This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal system, Subject name: Anatomy
[{'content': 'A 10 yr old girl presents with a tibial mass.histopayhological examination reveals a small round cell tumor.whivh of the following molecular findings is most likely to be present \nSelect and explain. \nA. 22q translocation, B. 11q deletion, C. 7ptranslocation, D. n-myc amplification', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ewings sarcoma and primitive neuro ectpdermal tumor are primary malignant small round cell tumors of bone and soft tissue. Reference Robbins page no 1232', 'role': 'assistant'}]