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 fifth generation amalgam included? \nSelect and explain. \nA. Silver, copper, tin, B. Silver, copper, zinc, tin, indium, C. Silver, copper, tin, indium, D. Silver, copper, tin, palladium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The alloying of silver, copper, tin and indium together creating a quaternary alloy in which almost none of the tin is available to react with the mercury when mixed with the powder, was the 5th generation amalgam to be developed.\nReference: Marzouk Operative dentistry, pg-106', 'role': 'assistant'}]