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': 'Retinoblsatoma is most similar to - \nSelect and explain. \nA. Fibroma, B. Phaeochromocytoma, C. Neuroblastoma, D. Astrocytoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Both retinoblastoma and neuroblastoma are small round cell tumors.', 'role': 'assistant'}]