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 is the noblest phase in amalgam reaction? 
Select and explain. 
A. Gamma phase, B. Gamma-1 phase, C. Gamma-2 phase, D. Mercury phase
B: Gamma-1 phase
Answer: B: Gamma-1 phase 
Explanation: The gamma-1 phase is the noblest phase and most resistant to tarnish and corrosion.
Reference: Marzouk Operative dentistry, pg-106