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A unit vector perpendicular to both the ...

A unit vector perpendicular to both the vectors `hati -2 hatj + 3hatk and hati + 2hatj - hatk ` is

A

`(-hati+hatj+hatk)`

B

`((-hati+hatj+hatk))/sqrt3`

C

`((hati-hatj+hatk))/sqrt2`

D

`((hati+hatj+hatk))/sqrt3`

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