The temperature of a piece of iron is \[{{27}^{o}}C\] and it is radiating energy at the rate of \[Q\ kW{{m}^{-2}}\]. If its temperature is raised to \[{{151}^{o}}C\], the rate of radiation of energy will become approximately [MP PET 1992]

• A.            \[2Q\ kW{{m}^{-2}}\]       
• B.            \[4Q\ kW{{m}^{-2}}\]
• C.            \[6Q\ kW{{m}^{-2}}\]       
• D.            \[8Q\ kW{{m}^{-2}}\]