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
[{'content': 'A one-month-old female child has swelled over the back in the sacral region. There is no cough impulse in the swelling. X-ray examination shows erosion of the coccyx. The most likely clinical diagnosis would be - \nSelect and explain. \nA. Meningocele, B. Lipoma, C. Sacro-coccygeal teratoma, D. Neurofibroma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In meningocele, there will be cough impulse.', 'role': 'assistant'}]