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When a system is taken from state `i` to a state f along path iaf , Q = 50 J and W = 20J . Along path ibf , Q = 35 . If W = `-13J` for the curved return path f `i` Q for this path is

A

33J

B

23 J

C

`-7 J`

D

`-43 J`

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The correct Answer is:
D
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