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The position vector of a point is R =x h...

The position vector of a point is `R =x hat i +y hat j + z hat k`and another vector is `A =3 hat i +2 hat j + 5hat k` .Which of the mathematical relations is correct ?

A

`nabla(vec A. vec R) =0`

B

`nabla(vec A. vec R) = vec A`

C

`nabla(vec A. vec R) = vec R`

D

none of these

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