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': 'Main disadvantage of single complete denture against natural teeth is: \nSelect and explain. \nA. Abrasion of artificial teeth, B. Difficulty in making of balanced occlusion, C. Abrasion of natural teeth, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]