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A 4.0 m long copper wire of cross sectio...

A 4.0 m long copper wire of cross sectional area `1.2 cm^(2)` is stretched by a force of `4.8 × 10^(3)` N stress will be -

A

`4 .0 xx 10^(7) N//mm^(2)`

B

`4 .0 xx 10^(7) KN//m^(2)`

C

`4 .0 xx 10^(7) N//m^(2)`

D

None of these

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