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': 'Which of the following configuration is used in designing an RPD with Kennedy — Class II edentulous arch? \nSelect and explain. \nA. Bilateral, B. Tripod, C. Quadrilateral, D. Unilateral', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]