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An ideal gas is taken through a cyclic t...

An ideal gas is taken through a cyclic thermodynamics process through four steps. The amount of heat given to the system in these steps are `Q_1 = 1000 J`, `Q_2 = -800 J`, `Q_3 = 450J`, `Q_4 = -200J` respectively. The efficiency of cycle is nearly

A

`31%`

B

`45%`

C

`35%`

D

`48%`

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