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: Pediatrics
[{'content': "A 1–year–old child presented with a swelling in the left flank with episodes of flushing, diarrhea, sweating and bone pain. The diagnosis is – \nSelect and explain. \nA. Neuroblastoma, B. Wilm's tumor, C. Medulloblastoma, D. Pheochromocytoma", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Clinical manifestations of neuroblastoma \n\nBecause neuroblastoma arises from neural crest derivatives of sympathetic nervous system, it produces catecholamines.\nSo, it may cause clinical feature due to : --> 1. Primary tumor\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 2. Metastais\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 3. Catecholamine secretion', 'role': 'assistant'}]