Given two vectors hati + hatj and hati +...

Given two vectors `hati + hatj and hati +2 hatj,` the unit vector coplanar with the two vectors and perpendicular to first is :

A

`1/sqrt2 (i+`

B

`1/sqrt5(2i+j)`

C

`+- 1/sqrt2 (i+j)`

D

none of these

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The correct Answer is:

C

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