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: Dental
[{'content': 'Early exfoliation of deciduous teeth is seen in \nSelect and explain. \nA. Papillon lefevre syndrome, B. Peter-Kelly syndrome, C. Pierre robin syndrome, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]