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': 'Marsupialization is the procedure done in \nSelect and explain. \nA. Large cyst, B. P.D. cyst, C. Aneurismal bone cyst, D. Stafne cyst', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]