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ABCDEF is a regular hexagon where centre...

ABCDEF is a regular hexagon where centre O is the origin, if the position vector of A is `hati-hatj+2hatk,` then `bar(BC)` is equal to

A

`hati-hatj+2hatk`

B

`-hati+hatj-2hatk`

C

`3hati+3hatj-4hatk`

D

Both (1) & (2)

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