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An ideal gas is made to go through a cyc...

An ideal gas is made to go through a cyclic thermodynamical process in four steps. The amount of heat involved are `Q_1 = 600 J`, Q_2 = -400 J, `Q_3 = -300 J and `Q_4 = 200 J` respectively. Then the corresponding work involved are `W_1 = 300J`, W_2 = -200 J, `W_3 = -150 J` and W_4 . What is the value of `W_4` ?

A

`-50 J`

B

`100 J`

C

`150 J`

D

`50 J`

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