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': "Raspberry tumour is another name for - \nSelect and explain. \nA. Umbilical fistula, B. Umbilical granuloma, C. Umbilical adenoma, D. Meckel's diverticulum", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]