When a system is taken from state $i$ to state $f$ along the path $iaf$, it is found that $Q=50 \;cal$ and $W=20\; cal$. Along the path $ibf$ Q = 36 cal. W along the path $ibf$ is : <br>

Question

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( A ) 66 cal
( B ) 6 cal
( C ) 14 cal
( D ) 16 cal