$\begin{array}{1 1} (A) \large\frac{1}{2}\hat i+\large\frac{1}{2}+\hat j+\large\frac{1}{\sqrt 2}\hat k \\ (B) -\large\frac{1}{2}\hat i+\large\frac{1}{2}+\hat j+\large\frac{1}{\sqrt 2}\hat k\\ (C) -\large\frac{1}{2}\hat i-\large\frac{1}{2}+\hat j+\large\frac{1}{\sqrt 2}\hat k\\ (D) \large\frac{1}{2}\hat i-\large\frac{1}{2}+\hat j+\large\frac{1}{\sqrt 2}\hat k \end{array} $