The unit vector perpendicular to hati-ha...

The unit vector perpendicular to `hati-hatj` and coplanar with `hati+2hatj` and `2hati+3hatj` is :

A

`(2hati-5hatj)/sqrt29`

B

`2hati+5hatj`

C

`1/sqrt2(hati+hatj)`

D

`hati + hatj`

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The correct Answer is:

C

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