Let A and B be two distinct points on the line L : x 6 3  = y 7 2  = z 7 2   . Both A and B are at a distance 2 17 from the foot of perpendicular drawn from the point (1, 2, 3) on the line L . If O is then OA  . OB   is equal to –

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Let A and B be two distinct points on the line L : x 6 3  = y 7 2  = z 7 2   . Both A and B are at a distance 2 17 from the foot of perpendicular drawn from the point (1, 2, 3) on the line L . If O is then OA  . OB   is equal to –

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