This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': "Small round cell tumors - \nSelect and explain. \nA. Wilm's tumor, B. Retinoblastoma, C. Rhabdomyosarcoma, D. All", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Characterized by small round.. Undifferentiated cells. Patternless sheets of cells with high cellullarity. And high N: C ratio. Include ewings sarcoma, peripheral neuroectodermal tumour, thabdomyosarcoma, synol sarcoma, non-hodgkins lymphoma, retinoblastoma etc', 'role': 'assistant'}]