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': 'If in an edentuluous patient, centric occlusion is not equal to centric relation, it  results into unstable dentures. This can be most closely related to: \nSelect and explain. \nA. Flattening of condylar head, B. Loss of proprioceptive impulses, C. Resorption of ridges, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]