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': "A malignant tumor of childhood, that metastsizes to bones most often, is \nSelect and explain. \nA. Wilm's tumor, B. Neuroblastoma, C. Adrenal gland tumors, D. Granulosa cell tumor of ovary", 'role': 'user'}, {'content': 'Answer: B \nExplanation: In neuroblastoma,metastasis is present in 60-70% of children,usually to the skeleton(facial bones,skull),bone marrow,also to lymph nodes. Reference:Essential pediatrics-Ghai,8th edition,page no:617.', 'role': 'assistant'}]