A particle has a position vector given by $\overrightarrow{\mathrm{r}}=2\hat{\mathrm{i}}+\hat{\mathrm{j}}-2\mathrm{k}$  m and velocity vector $\overrightarrow{\mathrm{v}}=\hat{\mathrm{i}}-\hat{\mathrm{j}}+\mathrm{k}$  m/s.  The angular velocity (rad/s) of the particle with respect to the origin at this instant is 

• A

  $\frac{\hat{\mathrm{i}}+4\hat{\mathrm{j}}+3\mathrm{k}}{9}$

• B

  $-\left(\frac{\hat{\mathrm{i}}+4\hat{\mathrm{j}}+3\mathrm{k}}{9}\right)$

• C

  $\frac{-\hat{\mathrm{i}}-4\hat{\mathrm{j}}+3\mathrm{k}}{9}$

• D

  Zero