Which of the following copper alloys is used for the manufacture of springs and suspension filaments in…

The answer is phosphor bronze, a copper–tin alloy with a little phosphorus. It is highly elastic, resists fatigue and corrosion and shows little hysteresis, so it is used for hair-springs and suspension strips in galvanometers and other meters. German silver (copper–nickel–zinc) is used mainly for resistance coils and decorative ware, aluminium bronze for coins and marine fittings, and ordinary bronze for bells, statues and bearings.