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': 'Rigafede syndrome is seen in: \nSelect and explain. \nA. Infant, B. Adolescent, C. Adult, D. Old age', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]