A black body is at a temperature 300 K. It emits energy at a rate, which is proportional to [Pb. PMT 1998; AIIMS 2002; MH CET 2003]

• A.            \[300\]                                      
• B.            \[{{(300)}^{2}}\]
• C.            \[{{(300)}^{3}}\]                 
• D.            \[{{(300)}^{4}}\]