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
The fifth generation amalgam included? 
Select and explain. 
A. Silver, copper, tin, B. Silver, copper, zinc, tin, indium, C. Silver, copper, tin, indium, D. Silver, copper, tin, palladium
C: Silver, copper, tin, indium
Answer: C: Silver, copper, tin, indium 
Explanation: 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.
Reference: Marzouk Operative dentistry, pg-106