A vector perpendicular to the plane cont...

A vector perpendicular to the plane contianing the points `A(1,-1,2), B(2 , 0, -1), C(0, 2, 1)` is

A

`4hati+8hatj-4hatk`

B

`8hati+4hatj+4hatk`

C

`3hati+hatj+2hatk`

D

`hati+hatj-hatk`

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The correct Answer is:

B

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