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': 'Kennedy bar is also known as: \nSelect and explain. \nA. Double lingual bar, B. Lingual plate, C. Lingual bar, D. Palatal plate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]