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': "'Ring sign' is seen in: September 2003 \nSelect and explain. \nA. Scurvy, B. Congenital syphilis, C. Gaucher's disease, D. All of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A i.e. Scurvy', 'role': 'assistant'}]