This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute Lymphoblastic Leukemia, Subject name: Pathology
[{'content': 'A young boy came with dyspnea and was found to have a mediastinal mass. Which of the following is known to produce mediastinal lymphadenopathy? \nSelect and explain. \nA. Diffuse large B cell Lymphoma, B. B cell rich T cell lymphoma, C. Mediastinal rich B cell lymphoma, D. T cell Lymphoblastic ALL', 'role': 'user'}, {'content': 'Answer: D \nExplanation: mediastinal lymphadenopathy ,sternal tenderness and mediastinal mass are seen with ALL.', 'role': 'assistant'}]