Find a unit vector perpendicular to A=2h...

Find a unit vector perpendicular to `A=2hat(i)+3hat(j)+hat(k)` and
`B=hat(i)-hat(j)+hat(k)` both.

A

`1/sqrt42(4hati-hatj-5hatk)`

B

`(4hati+hatj-5hatk)`

C

`(3hati-hatj-5hatk)`

D

`(3hati+hatj-5hatk)`

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The correct Answer is:

A

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