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': 'Carnoys solution is used in the treatment of: \nSelect and explain. \nA. Odontogenic keratocyst, B. Ameloblastoma, C. Dentigerous cyst, D. Mucocele', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]