A steel rod whose diameter is 2 cm and is 2m long experience heating from $$30^\circ to 150^\circ$$ . The coefficient of thermal expansiom is $$\alpha =12\times 10^{-4} / ^\circ C $$and the rod has been restricted in its original position .The thermal stress developed is 288 MPs.what is the value of young modulus $$ (GP_{a}) $$

A

50

B

100

C

150

D

200