Y-alloy contains

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

Answer: Option B

Solution(By Examveda Team)

Y-alloy contains 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