The focus of the parabola y^(2)-4y -x + ...

The focus of the parabola `y^(2)-4y -x + 3 =0` is

A

`((3)/(4), 2)`

B

`((3)/(4), -2)`

C

`(2, (-3)/(4))`

D

`((-3)/(4), 2)`

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The correct Answer is:

D

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