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A unit vector perpendicular to both the ...

A unit vector perpendicular to both the vectors `hati+hatjandhatj+hatk` is

A

`(hati+hatj+hatk)/(sqrt(3))`

B

`(hati-hatj+hatk)/(sqrt(3))`

C

`(-i-hatj+hatk)/(sqrt(3))`

D

`(hati+j-hatk)/(3)`

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The correct Answer is:
B
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