The unit vector perpendicular to both the vectors i ? 2j + 3k and i +

1.	The unit vector perpendicular to both the vectors i ? 2j + 3k and i + 2j ? k is [DCE 2001]
A.	\[\frac{1}{\sqrt{3}}(-i+j+k)\]
B.	\[(-\mathbf{i}+\mathbf{j}+\mathbf{k})\]
C.	\[\frac{(i+j-k)}{\sqrt{3}}\]
D.	None of these
Answer» B. \[(-\mathbf{i}+\mathbf{j}+\mathbf{k})\]

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The unit vector perpendicular to both the vectors i ? 2j + 3k and i + 2j ? k is [DCE 2001]

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