This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Surgery, Subject name: Surgery
[{'content': 'Most common renal tumor in infant:- \nSelect and explain. \nA. Renal cyst, B. Congenital mesoblastic nephroma, C. Neuroblastoma, D. Nephroblastoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Most common renal tumor in children Congenital mesoblastic nephroma. PEDIATRIC TUMORS * MC malignant tumor of infancy * MC extra-cranial solid tumor in children * MC abdominal malignancy in children * NeuroblastomaQ * MC primary malignant renal tumor of childhood * Wilms' tumorQ * MC renal tumor of infancy * Congenital mesoblastic nephromaQ * MC soft tissue tumor in infants & children * RhabdomyosarcomaQ * MC solid tumor of childhood * Brain tumorQ * MC cancer of childhood * LeukemiaQ(30%) >Brain tumorsQ(22%)", 'role': 'assistant'}]