The distance between the focii of the ellipse $(3x - 9)^2 + 9y^2 =(\sqrt 2 x + y +1)^2$ is-
The distance between the focii of the ellipse $(3x - 9)^2 + 9y^2 =(\sqrt 2 x + y +1)^2$ is-
- A
$(3{ \sqrt 2 }-1)$
- B
$\frac{{(3\sqrt 2 + 1) }}{{\sqrt 3 }}$
- C
${(3\sqrt 2 + 1) }$
- D
$\frac{{(3\sqrt 2 + 1) }}{{4\sqrt 3 }}$
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- [IIT 2004]
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