Let hati+yhatj+zhatk and xhati-hatj+hatk...

Let `hati+yhatj+zhatk` and `xhati-hatj+hatk` are parallel then unit vector parallel to `xhati+yhatj+zhatk`

A

`1/sqrt2(-hatj+hat k)`

B

`1/sqrt2(hati-hatj)`

C

`1/sqrt3(hat i+hat j-hat k)`

D

`1/sqrt3(hat i-hat j-hat k)`

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The correct Answer is:

D

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