The vector equation of a plane which is ...

The vector equation of a plane which is at a unit from the origin and
which is normal to the vector `hati-2hatj+3hatk` is

A

(a) `bar r.(hati-2hatj+3hatk)=1`

B

(b) `barr.(hati-2hatj+3hatk)=sqrt(14)`

C

(c) `barr.(hati+2hatj-3hatk)=1`

D

(d) `barr.(hati+2hatj-3hatk)=sqrt(14)`

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The correct Answer is:

B

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