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': 'Maryland bridge was first developed by: \nSelect and explain. \nA. Thompson, B. Dunn, C. Tanaka, D. Rochette', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Based on the work of Tanaka et al.\xa0on pitting corrosion for retaining acrylic resin facings and the metal etching studies of Dunn and Reisbick, Thompson and Livaditis at the University of Maryland developed a technique for the electrolytic etching of Ni-Cr and Cr-Co alloys.', 'role': 'assistant'}]