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': 'Bilateral balanced occlusion is based on the concept given by \nSelect and explain. \nA. Von Spee and Monson, B. G.V. Black, C. Sturdevant, D. Irian', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]