Q 1114491359.     If the distance of the point `P (1,2,1)` from the plane `x + 2y - 2z =alpha` where `alpha> 0`, is `5`, then the foot of the perpendicular to the plane is

NICL-GIC 2010
A

`(4/3, 4 /3, 1/3)`

B

` (1/3, 2/3, 10/3)`

C

`(2/3, 1/3, 5/2)`

D

`(8/3, 4/3, -7/3)`

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