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': 'Another name for electrolytic precipitate of gold is: \nSelect and explain. \nA. Mat gold, B. Gold foil, C. Electrophy, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mat Gold\nIn this form, gold is precipitated mainly through electrodeposition and it is accumulated in the form of strips or cakes.They are then subjected to a sintering process, in which there will be surface diffusion of the atoms of the particles, creating minimal cohesion between the particles.', 'role': 'assistant'}]