MCQ
$(\vec{P}+\vec{Q})$ is a unit vector along $X$-axis. If $\vec{P}=\hat{i}-\hat{j}+\hat{k}$ then $\vec{Q}$ is
- A$\hat{i}+\hat{j}-\hat{k}$
- ✓$\hat{j}-\hat{k}$
- C$\hat{i}+\hat{j}+\hat{k}$
- D$\hat{ j }+\hat{ k }$
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