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': "'Lost Salt Technique' is used to fabricate \nSelect and explain. \nA. Maryland bridge, B. Rochette bridge, C. Cantilever bridge, D. Virginia bridge", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]