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A metal wire 4m long and 2 xx 10^(-7) s...

A metal wire 4m long and `2 xx 10^(-7)` sq.m in cross-section is stretched by a force of 30N. If the work done in stretching that wire is `4.5x10^(-2)J` the young.s modulus of the wire is

A

`2xx 10^(11)Pa `

B

`4xx10^(11) Pa`

C

`2xx10^(12)Pa`

D

`4xx10^(12)Pa`

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