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': 'The covering over an omphalocele is \nSelect and explain. \nA. Skin, B. Amniotic membrane, C. Chorionic membrane, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The covering is made up of 2 layers - an outer layer of amniotic membrane & an inner layer of peritoneum.', 'role': 'assistant'}]