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': 'Infantogram shows presence of \nSelect and explain. \nA. Hemangioma, B. Sacrococcygeal teratoma, C. Myelomeningocele, D. Arnold-Chiari malformation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Sacrococcygeal teratomaThe image shows a soft tissue mass arising from gluteal region. The low density area on X-ray shows the presence of fat within the lesion. style="text-decoration: underline; color: rgba(17, 85, 204, 1); font-family: Times New Roman, Times, serif">rg/articles/sacrococcygeal-teratoma', 'role': 'assistant'}]