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
Which of the following generations of amalgam exhibit highest nobility? 
Select and explain. 
A. 3rd generation amalgam, B. 4th generation amalgam, C. 5th generation amalgam, D. 6th generation amalgam
D: 6th generation amalgam
Answer: D: 6th generation amalgam 
Explanation: The set amalgam exhibits the highest nobility of any previous amalgam and has been the most recent 6th generation of amalgam to be developed.
Reference: Marzouk Operative dentistry, pg-106