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
"Amalgam" means 
Select and explain. 
A. A metallic powder composed of silver, tin, copper and zinc, B. An alloy of two or more metals, one of which is mercury, C. An alloy of two or more metals that have been dissolved in each other in the molten state, D. A metallic substance in powder or tablet form that is mixed with mercury
B: An alloy of two or more metals, one of which is mercury
Answer: B: An alloy of two or more metals, one of which is mercury 
Explanation: None