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': 'Ruston bodies are resent in \nSelect and explain. \nA. Apical periodontal cyst, B. Infected dentigerous cyst, C. Gingival cyst of neonate, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ruston bodies are present in \n\nApical periodontal cyst\nInfected dentigerous cyst\nGingival cysts of neonate', 'role': 'assistant'}]