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The two sides of a triangle are 2x-y-1=0...

The two sides of a triangle are `2x-y-1=0 and x-2y+1=0` If orthocentre of triangle is `(7/3,7/3)` then distance of origin from centroid of triangle is

A

`sqrt2`

B

`2sqrt2`

C

`3sqrt2`

D

`4sqrt2`

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