This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Childhood tumors, Subject name: Pediatrics
[{'content': 'Neuroblastoma originates from \nSelect and explain. \nA. Adrenals, B. Mediastinum, C. Chest wall, D. Peripheral nerves', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Neuroblastoma is a malignant tumor of the autonomic nervous system derived from the neural crest.The most common sites of primary tumours are the adrenals(30%),paraveebral retroperitoneum(28%),posterior mediastinum(15%),pelvis(5%) &cervical area. Reference:Essential pediatrics-Ghai,8th edition,page no:616.', 'role': 'assistant'}]