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
Neuroblastoma originates from 
Select and explain. 
A. Adrenals, B. Mediastinum, C. Chest wall, D. Peripheral nerves
A: Adrenals
Answer: A: Adrenals 
Explanation: 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.