A particle acted on by constant forces $4 \hat{i} + \hat{j} - 3 \hat{k}$ and $3 \hat{i} + \hat{j} - \hat{k}$ is displaced from the point $\hat{i} + 2 \hat{j} + 3 \hat{k}$ to the point $5\hat{i} + 4\hat{j} + \hat{k}$. The total work done by the forces is :

Question

( A ) 30 unit
( B ) 50 unit
( C ) 20 unit
( D ) 40 unit