Engineering Materials
Pick up wrong statement about wrought iron

It melts at 1535°C
It contains carbon of the order of 0 to 0.25%
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It is very soft and ductile

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Engineering Materials
Duralumin 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
3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
5 to 6% tin, 2 to 3% copper and rest aluminium

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