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
[{'content': 'The most common method for reporting composition of alloy by manufacturers is by (Metallurgy): \nSelect and explain. \nA. Weight %, B. Volume, C. Weight in gms, D. Volume %', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The most common method for reporting composition of alloy by manufacturers\xa0is by weight%.', 'role': 'assistant'}]