__Dow metal contains__

• A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
• B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
• C. 90% aluminium and 90% copper
• D. 90% magnesium and 9% aluminium with some copper