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': 'CD 34 is a tumor marker used for - \nSelect and explain. \nA. Ewings sarcoma, B. Myofibrosarcoma, C. Alveolar soft part sarcoma, D. Inflammatory myofibroblastic tumor', 'role': 'user'}, {'content': "Answer: C \nExplanation: CD34 is found in alveolar soft part sarcoma, pre B-ALL, AML, dermatofibrosarcoma protuberans, GIST, giant cell fibroblastoma, granulocytic sarcoma, Kaposi's sarcoma, liposarcoma, malignant fibrous histiocytoma, MPNST, meningeal hemangiopericytomas, meningiomas, neurofibromas, schwannomas, and papillary thyroid carcinoma.", 'role': 'assistant'}]