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Let "O" be the origin and the position vectors of "A" and "B" be `2 hat i+2 hat j+hat k` and `2 hat i+4 hat j+4 hat k` respectively. If the internal bisector of `/_AOB` meets the line "AB" at "C", then the length of "OC" is

A

`2/3sqrt34`

B

`3/2sqrt34`

C

`2/3sqrt31`

D

`3/2sqrt31`

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