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': 'Solder and flux used for joining Elgiloy wires are \nSelect and explain. \nA. Gold solder and borax flux, B. Gold solder and fluoride flux, C. Silver solder and borax flux, D. Silver solder and fluoride flux', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]