A steel rod 50 mm in diameter, 300 cm long is subjected to a sudden pull of 10 tonnes the maximum instantaneous stress induced in the rod will be:

A

Less than 0.5 tonne / cm$$^2$$

B

Less than 0.75 tonne / cm$$^2$$

C

More than 1 tonne / cm$$^2$$

D

More than 2 tonne / cm$$^2$$