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A conducting wire has length L(1) and di...

A conducting wire has length `L_(1)` and diameter `d_(1)`. After stretching the same wire length becomes `L_(2)` and diameter `d_(2)`, The ratio of resistances before and after stretching is

A

`d_(2)^(4):d_(1)^(4)`

B

`d_(1)^(4):d_(2)^(4)`

C

`d_(2)^(2):d_(1)^(2)`

D

`d_(1)^(2):d_(2)^(2)`

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