સદિશો $(\vec{a} + \vec{b})$ અને $(\vec{a} - \vec{b})$ બંનેને લંબ એકમ સદિશ . . . . . . છે, જ્યાં $\vec{a} = \hat{i} + \hat{j} + \hat{k}$ અને $\vec{b} = \hat{i} + 2\hat{j} + 3\hat{k}$.

• A
  $-\frac{1}{\sqrt{6}}\hat{i} + \frac{2}{\sqrt{6}}\hat{j} - \frac{1}{\sqrt{6}}\hat{k}$
• B
  $-\frac{1}{\sqrt{6}}\hat{i} + \frac{2}{\sqrt{6}}\hat{j} - \frac{1}{\sqrt{6}}\hat{k}$
• C
  $\frac{1}{\sqrt{6}}\hat{i} - \frac{2}{\sqrt{6}}\hat{j} + \frac{1}{\sqrt{6}}\hat{k}$
• D
  $\frac{1}{\sqrt{6}}\hat{i} + \frac{2}{\sqrt{6}}\hat{j} + \frac{1}{\sqrt{6}}\hat{k}$