In a Carnot engine , when T2 = 0^@C and ...

In a Carnot engine , when `T_2 = 0^@C and T_1 = 200^@C` , its efficiency is `eta_1` and when `T_1 = 0^@C and T_2 = - 200^@C` its efficiency is `eta_2` then the efficiencies is

`1 : 15`

`1 : 1`

`1 : 2`

`1.73 : 1`

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