# Choose the correct answer if the value of $\hat i.( \hat j\times \hat k)+ \hat j . (\hat i \times \hat k) +\hat k. (\hat i \times \hat j)$ is
$\begin{array} (A)\; 0 \quad & (B)\; -1 \quad & (C)\;1 \quad & (D)\; 3 \end {array}$