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Let "P" and "Q" be the points on the lin...

Let "P" and "Q" be the points on the line `(x+3)/(8)=(y-4)/(2)=(z+1)/(2)` which are at a distance of "6" units from the point "R(1,2,3)" .If the centroid of the triangle "PQR" is `(alpha,beta,gamma)`,then `alpha^(2)+beta^(2)+gamma^(2)` is :

A

36

B

18

C

26

D

24

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