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: Surgery
A malignant tumor of childhood, that metastasizes to bones most often is - 
Select and explain. 
A. Wilm's tumor, B. Neuroblastoma, C. Adrenal gland tumors, D. Granulosa cell tumor of ovary
B: Neuroblastoma
Answer: B: Neuroblastoma 
Explanation: Ans. is 'b' i.e. Neuroblastoma Neuroblastoma is the most common tumor of children to metastasize to bones.