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
Powdered gold is marketed as: 
Select and explain. 
A. William's E-Z gold, B. Morgan's E-Z gold, C. Robert's E-Z gold, D. Taggart's E-Z gold
A: William's E-Z gold
Answer: A: William's E-Z gold 
Explanation: Powdered gold is made by a combination of chemical precipitation and atomization, with an average particle size of 15 mm.
The atomized particles are mixed together in wax, cut into pieces, and wrapped in No. 4 or No. 3 foil. Several sizes of these pellets are available. This product is marketed as William's E-Z Gold (Ivoclar-Williams, Amherst, NY).

​Sturdevant's Art and Science of Operative Dentistry. Edition 6. Page: e-158