The equation of the directrix of (x -1) ...

The equation of the directrix of `(x -1) ^(2) = 2 (y-2) ` is--

A

`2y - 3 = 0`

B

`2x + 1=0`

C

`2x -1 =0`

D

`2y - 1 =0`

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The correct Answer is:

D

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