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
Most common intraabdominal solid tumor in children 
Select and explain. 
A. Wilms tumor (Nephroblastoma), B. Neuroblastoma, C. RCC, D. All of the above
B: Neuroblastoma
Answer: B: Neuroblastoma 
Explanation: Neuroblastoma is the most common intra-abdominal & extra cranial solid tumor in children,accounting for 7-8% of all cancers.It is a malignant tumour of the autonomic nervous system derived from the neural crest. Reference:Essential pediatrics-Ghai,8th edition,page no:616.