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 most common method for reporting composition of alloy by manufacturers is by (Metallurgy): 
Select and explain. 
A. Weight %, B. Volume, C. Weight in gms, D. Volume %
A: Weight %
Answer: A: Weight % 
Explanation: The most common method for reporting composition of alloy by manufacturers is by weight%.