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
Discolored areas seen through the enamel in the teeth that have amalgam restorations are known as 
Select and explain. 
A. Amalgam tattoos, B. Amalgam overhangs, C. Amalgam blues, D. Amalgam ditchings
C: Amalgam blues
Answer: C: Amalgam blues 
Explanation: None