Question
a.
3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
b.
3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
c.
4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
d.
5 to 6% tin, 2 to 3% copper and rest aluminium
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Q. Y-alloy contains
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