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: Pathology
[{'content': 'Chocolate-coloured fluid is seen in the cystic space of \nSelect and explain. \nA. Dentigerous cyst, B. Odontogenic keratocyst, C. Unicystic ameloblastoma, D. Papillary cystadenoma tymphomatosum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]