The ratio of the resistances of a conduc...

The ratio of the resistances of a conductor at a temperature of `15^(@)C` to its resistance at a temperature of `37.5^(@)C` is `4:5`. The temperature coefficient of resistance of the conductor is

A

`1/25.^@C^(-1)`

B

`1/50.^@C^(-1)`

C

`1/80.^@C^(-1)`

D

`1/75.^@C^(-1)`

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The correct Answer is:

D

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