Q 2203134948.     Let the position vector of point `A` be `hat(i) + hat(j) + hat(k)` and `B` be

`- hat(i) + hat(j)`. The position vector of a point `R (vec(r)` such that `AR` is

perpendicular to `BR` and `vec(r)` is not perpendicular to

`(vec(r) - ( hat(j) + 2 hat(k) ))` is `.......................`

A

`hat(j) - 2 hat (k)`

B

`hat(j) + 2 hat (k)`

C

`2 hat(j) + 2 hat (k)`

D

`2 hat(j) - 2 hat (k)`

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