If veca=hati+hatj-hatk, vecb=hati-hatj+h...

If `veca=hati+hatj-hatk, vecb=hati-hatj+hatk` and `vecc` is a unit vector perpendiculr to the vector `veca` and coplanar with `veca` and `vecb`, then a unit vector `vecd` perpendicular to both `veca` and `vecc` is

A

`1/(sqrt(6))(2hati-hatj+hatjk)`

B

`1/(sqrt(2))(hatj+hatk)`

C

`1/(sqrt(2))(hati+hatj)`

D

`1/(sqrt(2))(hati+hatk)`

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B

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