If a= hati + hatj and b = 3 hati - 2 hat...

If `a= hati + hatj and b = 3 hati - 2 hatj,` then the vector r satisfying the equation `r xxa =b xxa and r xxb = a xx b` is

A

`- hati + hatj - 2 hatk`

B

` -hati - 4 hatj - 2 hatk`

C

`4 hati + hatj`

D

`4 hati - hatj`

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The correct Answer is:

D

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