Q 2331191022.     A variable plane at a unit distance from origin cuts the axes at `A, B, C`. If the centroid `(x, y, z)` of `Delta ABC` satisfies

`1/x^2 + 1/y^2 + 1/z^2 = k`, then `k` is

BITSAT Mock
A

`3`

B

`9`

C

`4`

D

`6`

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