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': 'The first generation amalgam was studied and recommended by? \nSelect and explain. \nA. Edward Crawcour, B. Wilmer Eames, C. Moses Crawcour, D. G. V. Black', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The first generation of amalgam was studied and recommended by G.V. Black\nReference: Marzouk Operative dentistry, pg-105', 'role': 'assistant'}]