In a Carnot engine, when \[{{T}_{2}}={{0}^{o}}C\] and \[{{T}_{1}}={{200}^{o}}C,\] its efficiency is \[{{\eta }_{1}}\]and when \[{{T}_{1}}=0{{\,}^{o}}C\] and \[{{T}_{2}}=-200{{\,}^{o}}C\], Its efficiency is \[{{\eta }_{2}}\], then what is \[{{\eta }_{1}}/{{\eta }_{2}}\] [DCE 2004]

• A.            0.577                                       
• B.            0.733
• C.            0.638                                       
• D.            Cannot be calculated