A uniform copper rod of length 50 cm and diameter 3.0 mm is kept on a frictionless horizontal surface at `20^(@)C`. The coefficient of linear expansion of copper is `2.0 xx 10^(-5) K^(-1)` and Young's modulus is `1.2 xx 10^(11) N//m^(2)`. The copper rod is heated to `100^(@)C`, then the tension developed in the copper rod is

Options

A. `12xx10^(3) N`
B. `36 X 10^(3) N`
C. `18xx10^(3) N`
D. Zero