The vorticity vector at (1, 1,1) is

Question

Velocity vector of a flow fields is given as $\vec{V}= 2xy\hat{i}-x^{2}z\hat{j}$. The vorticity vector at (1, 1,1) is                                                  

      (a)$4 \hat{i}-\hat{j}$                          (b) $4 \hat{i}-\hat{k}$                       (c)$\hat{i}-4\hat{j}$                          (d)$\hat{i}-4\hat{k}$