1 . 2i∧-2j∧+6k∧

• A. $\pm \frac{{\displaystyle \stackrel{\wedge }{i}}+{\displaystyle \stackrel{\wedge }{j}}}{\sqrt{2}}$
• B. $\pm \frac{{\displaystyle \stackrel{\wedge }{k}}}{\sqrt{2}}$
• C. $\pm \frac{{\displaystyle \stackrel{\wedge }{i}}+{\displaystyle \stackrel{\wedge }{j}}}{\sqrt{44}}$
• D. $\pm \frac{{\displaystyle \stackrel{\wedge }{i}}+{\displaystyle \stackrel{\wedge }{j}}}{2\sqrt{2}}$

Answer: Option A

Explanation: