Correct option is A
· Manganin is an alloy primarily composed of copper (about 84-86%), manganese (about 12-13%), and nickel (about 2-4%).
· This alloy is well known for its very low temperature coefficient of resistance, making it ideal for use in precision resistors, strain gauges, and other applications where stable resistance over a range of temperatures is essential.
Therefore, the correct answer is (a) copper, manganese and nickel.
